Document:

1998 Stock Option Plan and form of stock option agreement thereunder

  
 Exhibit 10.2

  
 Brightmail, Inc. 
  
 1998 STOCK OPTION PLAN 
  
 1. Purposes of the Plan. The purposes of this 1998 Stock Option Plan
are to attract and retain the best available personnel for positions of substantial responsibility, to provide additional incentive to Employees and Consultants of the Company and its Subsidiaries and to promote the success of the Company’s
business. Options granted under the Plan may be Incentive Stock Options or Nonstatutory Stock Options, as determined by the Administrator at the time of grant of an Option and subject to the applicable provisions of Section 422 of the Code and the
regulations promulgated thereunder. 
  
 2. Definitions. As
used herein, the following definitions shall apply: 
  
 (a) “Administrator” means the Board or any of its Committees appointed pursuant to Section 4 of the Plan. 
  
 (b) “Applicable Laws” means the legal requirements relating to the administration of stock option plans under U.S. state
corporate laws, U.S. federal and state securities laws, the Code and the applicable laws of any foreign country or jurisdiction where Options are, or will be, granted under the Plan. 
  
 (c) “Board” means the Board of Directors of the Company. 
  
 (d) “Code” means the Internal Revenue Code
of 1986, as amended. 
  
 (e)
“Committee” means a Committee appointed by the Board of Directors in accordance with Section 4 of the Plan. 
  
 (f) “Common Stock” means the Common Stock of the Company. 
  
 (g) “Company” means Brightmail, Inc., a California corporation. 
  
 (h) “Consultant” means any person who is
engaged by the Company or any Parent or Subsidiary to render consulting or advisory services and is compensated for such services, and any Director of the Company whether compensated for such services or not. If the Company registers any class of
any equity security pursuant to the Exchange Act, the term Consultant shall thereafter not include Directors who are not compensated for their services or are paid only a Director’s fee by the Company. 
  
 (i) “Continuous Status as an Employee or
Consultant” means that the employment or consulting relationship with the Company, any Parent or Subsidiary is not interrupted or terminated. Continuous Status as an Employee or Consultant shall not be considered interrupted in the case of
(i) any leave of absence approved by the Company or (ii) transfers between locations of the Company or between the Company, its Parent, any Subsidiary, or any successor. A leave of absence approved by the Company shall include sick leave, military
leave, or any other personal leave approved by an authorized representative of the Company. For purposes of Incentive Stock Options, no such leave may exceed 90 days, unless reemployment upon expiration of such leave is guaranteed by statute or
contract, including Company policies. If reemployment upon expiration of a leave of absence approved by the Company is not so 

  

 
guaranteed, on the 91st day of such leave any Incentive Stock Option held by the Optionee shall cease to be treated as an Incentive Stock Option and shall be
treated for tax purposes as a Nonstatutory Stock Option. 
  
 (j) “Director” means a member of the Board of Directors of the Company. 
  
 (k) “Employee” means any person, including Officers and Directors, employed by the Company or any Parent or Subsidiary of
the Company. The payment of a Director’s fee by the Company shall not be sufficient to constitute “employment” by the Company. 
  
 (l) “Exchange Act” means the Securities Exchange Act of 1934, as amended. 
  
 (m) “Fair Market Value” means, as of any
date, the value of Common Stock determined as follows: 
  
 (i) If the Common Stock is listed on any established stock exchange or a national market system, including without limitation The Nasdaq National Market or The Nasdaq SmallCap Market of The Nasdaq Stock Market, its Fair Market Value shall
be the closing sales price for such stock (or the closing bid, if no sales were reported) as quoted on such exchange or system for the last market trading day prior to the time of determination, as reported in The Wall Street Journal or such
other source as the Administrator deems reliable; 
  
 (ii) If the Common Stock is regularly quoted by a recognized securities dealer but selling prices are not reported, its Fair Market Value shall be the mean between the high bid and low asked prices for the Common Stock on the last market
trading day prior to the day of determination; or 
  
 (iii) In the absence of an established market for the Common Stock, the Fair Market Value thereof shall be determined in good faith by the Administrator. 
  
 (n) “Incentive Stock Option” means an Option intended to qualify as an incentive stock
option within the meaning of Section 422 of the Code. 
  
 (o) “Nonstatutory Stock Option” means an Option not intended to qualify as an Incentive Stock Option. 
  
 (p) “Officer” means a person who is an officer of the Company within the meaning of Section 16 of the Exchange Act and
the rules and regulations promulgated thereunder. 
  
 (q) “Option” means a stock option granted pursuant to the Plan. 
  
 (r) “Optioned Stock” means the Common Stock subject to an Option. 
  
 (s) “Optionee” means an Employee or
Consultant who receives an Option. 
  
 (t)
“Parent” means a “parent corporation” whether now or hereafter existing, as defined in Section 424(e) of the Code. 
  
 (u) “Plan” means this 1998 Stock Option Plan. 
  
 (v) “Section 16(b)” means Section 16(b) of the Securities Exchange Act of 1934, as amended.

  

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 (w) “Share” means a share of the Common Stock, as adjusted in accordance
with Section 11 below. 
  
 (x)
“Subsidiary” means a “subsidiary corporation,” whether now or hereafter existing, as defined in Section 424(f) of the Code. 
  
 3. Stock Subject to the Plan. Subject to the provisions of Section 11 of the Plan, the maximum aggregate number of Shares that may be subject to
option and sold under the Plan is One Million Six Hundred Forty Nine Thousand Nine Hundred Eighty Seven (1,649,987) Shares. The Shares may be authorized but unissued, or reacquired Common Stock. 
  
 If an Option expires or becomes unexercisable without having
been exercised in full, or is surrendered pursuant to an option exchange program, the unpurchased Shares that were subject thereto shall become available for future grant or sale under the Plan (unless the Plan has terminated). However, Shares that
have actually been issued under the Plan, upon exercise of an Option, shall not be returned to the Plan and shall not become available for future distribution under the Plan, except that if Shares are repurchased by the Company at their original
purchase price, and the original purchaser of such Shares did not receive any benefits of ownership of such Shares, such Shares shall become available for future grant under the Plan. For purposes of the preceding sentence, voting rights shall not
be considered a benefit of Share ownership. 
  
 4.
Administration of the Plan. 
  
 (a)
Initial Plan Procedure. Prior to the date, if any, upon which the Company becomes subject to the Exchange Act, the Plan shall be administered by the Board or a Committee appointed by the Board. 
  
 (b) Plan Procedure after the Date, if any, upon which the
Company Becomes Subject to the Exchange Act. 
  
 (i) Multiple Administrative Bodies. If permitted by Rule 16b-3, the Plan may be administered by different bodies with respect to Directors, Officers and Employees who are neither Directors nor Officers. 
  
 (ii) Administration with Respect to Directors and
Officers. With respect to grants of Options to Employees who are also Officers or Directors of the Company, the Plan shall be administered by (A) the Board if the Board may administer the Plan in compliance with the rules under Rule 16b-3
promulgated under the Exchange Act or any successor thereto (“Rule 16b-3”) relating to the disinterested administration of employee benefit plans under which Section 16(b) exempt discretionary grants and awards of equity securities
are to be made, or (B) a Committee designated by the Board to administer the Plan, which Committee shall be constituted to comply with the rules under Rule 16b-3 relating to the disinterested administration of employee benefit plans under which
Section 16(b) exempt discretionary grants and awards of equity securities are to be made. Once appointed, such Committee shall continue to serve in its designated capacity until otherwise directed by the Board. From time to time the Board may
increase the size of the Committee and appoint additional members thereof, remove members (with or without cause) and appoint new members in substitution therefore, fill vacancies, however caused, and remove all members of the Committee and
thereafter directly administer the Plan, all to the extent permitted by the rules under Rule 16b-3 relating to the disinterested administration of employee benefit plans under which Section 16(b) exempt discretionary grants and awards of equity
securities are to be made. 
  

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 (iii) Administration with Respect to Other Employees and Consultants. With respect
to grants of Options and to Employees or Consultants who are neither Directors nor Officers of the Company, the Plan shall be administered by (A) the Board or (B) a Committee designated by the Board, which committee shall be constituted in such a
manner as to satisfy Applicable Laws. Once appointed, such Committee shall continue to serve in its designated capacity until otherwise directed by the Board. From time to time the Board may increase the size of the Committee and appoint additional
members thereof, remove members (with or without cause) and appoint new members in substitution therefore, fill vacancies, however caused, and remove all members of the Committee and thereafter directly administer the Plan, all to the extent
permitted by the Applicable Laws. 
  
 (c)
Powers of the Administrator. Subject to the provisions of the Plan and, in the case of a Committee, the specific duties delegated by the Board to such Committee, and subject to the approval of any relevant authorities, including the approval,
if required, of any stock exchange upon which the Common Stock is listed, the Administrator shall have the authority in its discretion: 
  
 (i) to determine the Fair Market Value of the Common Stock, in accordance with Section 2(m) of the Plan; 
  
 (ii) to select the Consultants and Employees to whom Options
may from time to time be granted hereunder; 
  
 (iii) to determine whether and to what extent Options are granted hereunder; 
  
 (iv) to determine the number of Shares to be covered by each such award granted hereunder; 
  
 (v) to approve forms of agreement for use under the Plan;

  
 (vi) to determine the terms and conditions of
any award granted hereunder; 
  
 (vii) to
determine whether and under what circumstances an Option may be settled in cash under subsection 9(f) instead of Common Stock; 
  
 (viii) to reduce the exercise price of any Option to the then current Fair Market Value if the Fair Market Value of the Common Stock
covered by such Option has declined since the date the Option was granted; 
  
 (ix) to provide for the early exercise of Options for the purchase of unvested shares subject to such terms and conditions as the Administrator may determine; and 
  
 (x) to construe and interpret the terms of the Plan and
awards granted pursuant to the Plan. 
  
 (d)
Effect of Administrator’s Decision. All decisions, determinations and interpretations of the Administrator shall be final and binding on all Optionees and any other holders of any Options. 
  

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 5. Eligibility. 
  
 (a) Nonstatutory Stock Options may be granted to Employees and Consultants. Incentive Stock Options may be
granted only to Employees. An Employee or Consultant who has been granted an Option may, if otherwise eligible, be granted additional Options. 
  
 (b) Each Option shall be designated in the written option agreement as either an Incentive Stock Option or a Nonstatutory Stock Option.
However, notwithstanding such designation, to the extent that the aggregate Fair Market Value of the Shares with respect to which Incentive Stock Options are exercisable for the first time by the Optionee during any calendar year (under all plans of
the Company and any Parent or Subsidiary) exceeds $100,000, such Options shall be treated as Nonstatutory Stock Options. For purposes of this Section 5(b), Incentive Stock Options shall be taken into account in the order in which they were granted.
The Fair Market Value of the Shares shall be determined as of the time the Option with respect to such Shares is granted. 
  
 (c) Neither the Plan nor any Option shall confer upon any Optionee any right with respect to continuation of his or her employment or
consulting relationship with the Company, nor shall it interfere in any way with his or her right or the Company’s right to terminate his or her employment or consulting relationship at any time, with or without cause. 
  
 (d) Upon the Company or a successor corporation issuing any
class of common equity securities required to be registered under Section 12 of the Exchange Act or upon the Plan being assumed by a corporation having a class of common equity securities required to be registered under Section 12 of the Exchange
Act, the following limitations shall apply to grants of Options to Employees: 
  
 (i) The foregoing limitations shall be adjusted proportionately in connection with any change in the Company’s capitalization as described in Section 11. 
  
 (ii) If an Option is cancelled in the same fiscal year of
the Company in which it was granted (other than in connection with a transaction described in Section 11), the cancelled Option shall be counted against the limit set forth in subsection (i) above. For this purpose, if the exercise price of an
Option is reduced, such reduction will be treated as a cancellation of the Option and the grant of a new Option. 
  
 6. Term of Plan. The Plan shall become effective upon the earlier to occur of its adoption by the Board of Directors or its approval by the
shareholders of the Company, as described in Section 17 of the Plan. It shall continue in effect for a term of ten (10) years unless sooner terminated under Section 13 of the Plan. 
  
 7. Term of Option. The term of each Option shall be the term stated in the Option Agreement; provided, however, that
the term shall be no more than ten (10) years from the date of grant thereof. In the case of an Incentive Stock Option granted to an Optionee who, at the time the Option is granted, owns stock representing more than ten percent (10%) of the voting
power of all classes of stock of the Company or any Parent or Subsidiary, the term of the Option shall be five (5) years from the date of grant thereof or such shorter term as may be provided in the Option Agreement. 
  

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 8. Option Exercise Price and Consideration. 
  
 (a) The per share exercise price for the Shares to be issued
upon exercise of an Option shall be such price as is determined by the Administrator, but shall be subject to the following: 
  
 (i) In the case of an Incentive Stock Option 
  
 (A) granted to an Employee who, at the time of grant of such Option, owns stock representing more than ten percent (10%) of the voting
power of all classes of stock of the Company or any Parent or Subsidiary, the per Share exercise price shall be no less than 110% of the Fair Market Value per Share on the date of grant. 
  
 (B) granted to any other Employee, the per Share exercise price shall be no less than 100% of the Fair
Market Value per Share on the date of grant. 
  
 (ii) In the case of a Nonstatutory Stock Option 
  
 (A) granted to a person who, at the time of grant of such Option, owns stock representing more than ten percent (10%) of the voting power of all classes of stock of the Company or any Parent or Subsidiary, the per
Share exercise price shall be no less than 110% of the Fair Market Value per Share on the date of the grant. 
  
 (B) granted to any other person, the per Share exercise price shall be no less than 85% of the Fair Market Value per Share on the date of
grant. 
  
 (b) The consideration to be paid for
the Shares to be issued upon exercise of an Option, including the method of payment, shall be determined by the Administrator (and, in the case of an Incentive Stock Option, shall be determined at the time of grant). Such consideration may consist
of (1) cash, (2) check, (3) promissory note, (4) other Shares that (x) in the case of Shares acquired upon exercise of an Option, have been owned by the Optionee for more than six months on the date of surrender, and (y) have a Fair Market Value on
the date of surrender equal to the aggregate exercise price of the Shares as to which such Option shall be exercised, (5) delivery of a properly executed exercise notice together with such other documentation as the Administrator and a broker, if
applicable, shall require to effect an exercise of the Option and delivery to the Company of the sale or loan proceeds required to pay the exercise price, or (6) any combination of the foregoing methods of payment. In making its determination as to
the type of consideration to accept, the Administrator shall consider if acceptance of such consideration may be reasonably expected to benefit the Company. 
  
 9. Exercise of Option. 
  
 (a) Procedure for Exercise; Rights as a Shareholder. Any Option granted hereunder shall be exercisable at such times and under such
conditions as determined by the Administrator, including performance criteria with respect to the Company and/or the Optionee, and as shall be permissible under the terms of the Plan. 
  
 An Option may not be exercised for a fraction of a Share. 
  
 An Option shall be deemed to be exercised when written
notice of such exercise has been given to the Company in accordance with the terms of the Option by the person entitled to exercise the Option and full payment for the Shares with respect to which the Option is exercised has been received by the
Company. Full payment may, as authorized by the Administrator, consist of any consideration and method of payment allowable under Section 8(b) hereof. Until the issuance (as evidenced by the appropriate entry on the books of the Company or of a duly
authorized transfer agent of the Company) of the stock certificate evidencing such Shares, no right to vote, receive dividends or any other rights as a shareholder shall exist with respect to the Optioned Stock, notwithstanding the exercise of the
Option. The Company 

  

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shall issue (or cause to be issued) such stock certificate promptly upon exercise of the Option. No adjustment shall be made for a dividend or other right
for which the record date is prior to the date the stock certificate is issued, except as provided in Section 11 hereof. 
  
 Exercise of an Option in any manner shall result in a decrease in the number of Shares that thereafter may be available, both for purposes
of the Plan and for sale under the Option, by the number of Shares as to which the Option is exercised. 
  
 (b) Termination of Employment or Consulting Relationship. In the event of termination of an Optionee’s Continuous Status as an
Employee or Consultant (but not in the event of an Optionee’s change of status from Employee to Consultant (in which case an Employee’s Incentive Stock Option shall automatically convert to a Nonstatutory Stock Option on the date three (3)
months and one day following such change of status) or from Consultant to Employee), such Optionee may, but only within such period of time as is determined by the Administrator, of at least thirty (30) days, with such determination in the case of
an Incentive Stock Option not exceeding three (3) months after the date of such termination (but in no event later than the expiration date of the term of such Option as set forth in the Option Agreement), exercise his or her Option to the extent
that the Optionee was entitled to exercise it at the date of such termination. To the extent that the Optionee was not entitled to exercise the Option at the date of such termination, or if the Optionee does not exercise such Option to the extent so
entitled within the time specified herein, the Option shall terminate. 
  
 (c) Disability of Optionee. In the event of termination of an Optionee’s Continuous Status as an Employee or Consultant as a result of his or her disability, the Optionee may, but only within twelve (12)
months from the date of such termination (and in no event later than the expiration date of the term of such Option as set forth in the Option Agreement), exercise the Option to the extent otherwise entitled to exercise it at the date of such
termination. If such disability is not a “disability” as such term is defined in Section 22(e)(3) of the Code, in the case of an Incentive Stock Option such Incentive Stock Option shall automatically cease to be treated as an Incentive
Stock Option and shall be treated for tax purposes as a Nonstatutory Stock Option on the day three months and one day following such termination. To the extent that the Optionee was not entitled to exercise the Option at the date of termination, or
if the Optionee does not exercise such Option to the extent so entitled within the time specified herein, the Option shall terminate, and the Shares covered by such Option shall revert to the Plan. 
  
 (d) Death of Optionee. In the event of the death of
an Optionee, the Option may be exercised at any time within twelve (12) months following the date of death (but in no event later than the expiration of the term of such Option as set forth in the Notice of Grant) by the Optionee’s estate or by
a person who acquired the right to exercise the Option by bequest or inheritance, but only to the extent that the Optionee was entitled to exercise the Option on the date of death. If, at the time of death, the Optionee was not entitled to exercise
his or her entire Option, the Shares covered by the unexercisable portion of the Option shall immediately revert to the Plan. If, after the Optionee’s death, the Optionee’s estate or a person who acquires the right to exercise the Option
by bequest or inheritance does not exercise the Option within the time specified herein, the Option shall terminate, and the Shares covered by such Option shall revert to the Plan. 
  
 (e) Rule 16b-3. Options granted to persons subject to Section 16(b) of the Exchange Act must comply
with Rule 16b-3 and shall contain such additional conditions or restrictions as may be required thereunder to qualify for the maximum exemption from Section 16 of the Exchange Act with respect to Plan transactions. 
  

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 (f) Buyout Provisions. The Administrator may at any time offer to buy out for a
payment in cash or Shares, an Option previously granted, based on such terms and conditions as the Administrator shall establish and communicate to the Optionee at the time that such offer is made. 
  
 10. Non-Transferability of Options. Options may not be sold, pledged,
assigned, hypothecated, transferred, or disposed of in any manner other than by will or by the laws of descent or distribution and may be exercised, during the lifetime of the Optionee, only by the Optionee. 
  
 11. Adjustments Upon Changes in Capitalization or Merger. 

 
 (a) Changes in Capitalization. Subject to any
required action by the shareholders of the Company, the number of shares of Common Stock covered by each outstanding Option, and the number of shares of Common Stock that have been authorized for issuance under the Plan but as to which no Option has
yet been granted or that has been returned to the Plan upon cancellation or expiration of an Option, as well as the price per share of Common Stock covered by each such outstanding Option, shall be proportionately adjusted for any increase or
decrease in the number of issued shares of Common Stock resulting from a stock split, reverse stock split, stock dividend, combination or reclassification of the Common Stock, or any other increase or decrease in the number of issued shares of
Common Stock effected without receipt of consideration by the Company. The conversion of any convertible securities of the Company shall not be deemed to have been “effected without receipt of consideration.” Such adjustment shall be made
by the Board, whose determination in that respect shall be final, binding and conclusive. Except as expressly provided herein, no issuance by the Company of shares of stock of any class, or securities convertible into shares of stock of any class,
shall affect, and no adjustment by reason thereof shall be made with respect to, the number or price of shares of Common Stock subject to an Option. 
  
 (b) Dissolution or Liquidation. In the event of the proposed dissolution or liquidation of the Company, the Administrator shall
notify the Optionee at least fifteen (15) days prior to such proposed action. To the extent it has not been previously exercised, the Option shall terminate immediately prior to the consummation of such proposed action. 
  
 (c) Merger Stock or Asset Sale. In the event of a
merger of the Company with or into another corporation, or the sale of all or substantially all of the stock or assets of the Company (each, a “Change of Control”), each outstanding Option and Stock Purchase Right shall be assumed or an
equivalent option or right substituted by the successor corporation or a Parent or Subsidiary of the successor corporation. The number of shares vesting monthly under each assumed or substituted Option shall remain unchanged, such that, the Option
will vest fully in four or less years. In the event that the successor corporation refuses to assume or substitute for the Option or Stock Purchase Right, then, upon the closing of such Change of Control, the Administrator shall notify the Optionee
in writing or electronically that the Option or Stock Purchase Right shall be exercisable as to vested shares for a period of fifteen (15) days from the date of such notice, and that the Option or Stock Purchase Right shall terminate upon the
expiration of such period. 
  
 For the purposes
of this subsection, the Option or Stock Purchase Right shall be considered assumed if, following the Change of Control, the option or right confers the right to purchase or receive, for each Share of Optioned Stock subject to the Option or Stock
Purchase Right immediately prior to the Change of Control, the consideration (whether stock, cash, or other securities or property) received in the Change of Control by holders of Common Stock for each Share held on the closing of the transaction
(and if holders were offered a choice of consideration, the type of consideration chosen by the holders of a majority of the outstanding Shares); provided, however, that if such consideration received in the Change of Control is not 

  

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solely common stock of the successor corporation or its Parent, the Administrator may, with the consent of the successor corporation, provide for the
consideration to be received upon the exercise of the Option or Stock Purchase Right, for each Share of Optioned Stock subject to the Option or Stock Purchase Right, to be solely common stock of the successor corporation or its Parent equal in fair
market value to the per share consideration received by holders of Common Stock in the Change of Control. 
  
 12. Time of Granting Options. The date of grant of an Option shall, for all purposes, be the date on which the Administrator makes the
determination granting such Option, or such other date as is determined by the Administrator. Notice of the determination shall be given to each Employee or Consultant to whom an Option is so granted within a reasonable time after the date of such
grant. 
  
 13. Amendment and Termination of the Plan.

  
 (a) Amendment and Termination. The
Board may at any time amend, alter, suspend or discontinue the Plan, but no amendment, alteration, suspension or discontinuation shall be made that would impair the rights of any Optionee under any grant theretofore made, without his or her consent.
In addition, to the extent necessary and desirable to comply with Rule 16b-3 under the Exchange Act or with Section 422 of the Code (or any other applicable law or regulation, including the requirements of the NASD or an established stock exchange),
the Company shall obtain shareholder approval of any Plan amendment in such a manner and to such a degree as required. 
  
 (b) Effect of Amendment or Termination. Any such amendment or termination of the Plan shall not affect Options already granted, and
such Options shall remain in full force and effect as if this Plan had not been amended or terminated, unless mutually agreed otherwise between the Optionee and the Administrator, which agreement must be in writing and signed by the Optionee and the
Company. 
  
 14. Conditions upon Issuance of Shares. Shares
shall not be issued pursuant to the exercise of an Option unless the exercise of such Option and the issuance and delivery of such Shares pursuant thereto shall comply with all relevant provisions of law, including, without limitation, the
Securities Act of 1933, as amended, the Exchange Act, the rules and regulations promulgated thereunder, and the requirements of any stock exchange upon which the Shares may then be listed, and shall be further subject to the approval of counsel for
the Company with respect to such compliance. 
  
 As a condition to the exercise of an Option, the Company may require the person exercising such Option to represent and warrant at the time of any such exercise that the Shares are being purchased only for investment and without any present
intention to sell or distribute such Shares if, in the opinion of counsel for the Company, such a representation is required by any of the aforementioned relevant provisions of law. 
  
 15. Reservation of Shares. The Company, during the term of this Plan, shall at all times reserve and keep available
such number of Shares as shall be sufficient to satisfy the requirements of the Plan. 
  
 The inability of the Company to obtain authority from any regulatory body having jurisdiction, which authority is deemed by the
Company’s counsel to be necessary to the lawful issuance and sale of any Shares hereunder, shall relieve the Company of any liability in respect of the failure to issue or sell such Shares as to which such requisite authority shall not have
been obtained. 
  

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 16. Agreements. Options shall be evidenced by written agreements in such form as the Administrator
shall approve from time to time. 
  
 17. Shareholder
Approval. Continuance of the Plan shall be subject to approval by the shareholders of the Company within twelve (12) months before or after the date the Plan is adopted. Such shareholder approval shall be obtained in the degree and manner
required under Applicable Laws and the rules of any stock exchange upon which the Common Stock is listed. 
  
 18. Information to Optionees and Purchasers. The Company shall provide to each Optionee and to each individual who acquires Shares pursuant to the
Plan, not less frequently than annually during the period such Optionee or purchaser has one or more Options outstanding, and, in the case of an individual who acquires Shares pursuant to the Plan, during the period such individual owns such Shares,
copies of annual financial statements. The Company shall not be required to provide such statements to key employees whose duties in connection with the Company assure their access to equivalent information. 
  

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 BRIGHTMAIL INCORPORATED 
  
 1998 STOCK OPTION PLAN 
  
 STOCK OPTION AGREEMENT 
  
 Unless otherwise defined herein, the terms defined in the Plan shall have the same defined meanings in this Stock Option Agreement. 
  

	I.	NOTICE OF STOCK OPTION GRANT 

  
 Grant #: 

  
 You have been granted an option to purchase Common Stock of Brightmail Incorporated (the “Company”), subject to the terms and conditions of the
Plan and this Stock Option Agreement, as follows: 
  
 Date of Grant: 
  
 Vesting Commencement
Date: 
  
 Exercise Price per Share: 

 
 Total Number of Shares Granted: 
  
 Total Exercise Price: 
  

			
	 Type of Option:
	  	  ̈  Incentive Stock
Option

		
	 	  	  ̈  Nonstatutory Stock
Option

  
 Term/Expiration Date: 
  
 Exercise and
Vesting Schedule: 
  
 This Option is exercisable immediately, in
whole or in part, conditioned upon Optionee entering into a Restricted Stock Purchase Agreement with respect to any unvested Shares. The Shares subject to this Option shall vest and/or be released from the Company’s repurchase option, as set
forth in the Restricted Stock Purchase Agreement, according to the following schedule: 
  
 25% of the Shares subject to the Option shall vest one year after the Vesting Commencement Date, and 1/48th of the Shares subject to the Option shall vest on the first day of each month thereafter, so that all of the
Shares shall be vested on the first day of the 48th month after the Vesting Commencement Date. 

 Termination Period: 
  
 This Option may be exercised, to the extent vested, for ninety (90) days
after termination of Optionee’s employment or consulting relationship, or such longer period as may be applicable upon death or disability of Optionee as provided in the Plan, but in no event later than the Term/Expiration Date as provided
above. 
  

	II.	AGREEMENT 

  
 1. Grant of Option. Brightmail Incorporated, a California corporation (the “Company”), hereby grants to the Optionee named in the Notice
of Grant (the “Optionee”), an option (the “Option”) to purchase the total number of shares of Common Stock (the “Shares”) set forth in the Notice of Grant, at the exercise price per share set forth in the Notice of
Grant (the “Exercise Price”) subject to the terms, definitions and provisions of the 1998 Stock Option Plan (the “Plan”) adopted by the Company, which is incorporated herein by reference. 
  
 If designated in the Notice of Grant as an Incentive Stock Option
(“ISO”), this Option is intended to qualify as an ISO as defined in section 422 of the Code. However, if this Option is intended to be an ISO, to the extent that it exceeds the $100,000 rule of Code section 422(d) it shall be treated as a
Nonstatutory Stock Option (“NSO”). 
  
 2. Exercise of
Option. This Option shall be exercisable during its term in accordance with the provisions of Section 9 of the Plan as follows: 
  
 (a) Right to Exercise. 
  
 (i) Subject to subsections 2(a)(ii) through 2(a)(v) below, this Option shall be exercisable cumulatively according to the vesting schedule
set out in the Notice of Grant. Alternatively, at the election of the Optionee, this option may be exercised in whole or in part at any time as to Shares which have not yet vested. For purposes of this Stock Option Agreement, Shares subject to this
Option shall vest based on continued employment of or consulting services by Optionee with the Company. Vested Shares shall not be subject to the Company’s repurchase right (as set forth in the Restricted Stock Purchase Agreement, attached
hereto as Exhibit C-1). 
  
 (ii) As a
condition to exercising this Option for unvested Shares, the Optionee shall execute the Restricted Stock Purchase Agreement. 
  
 (iii) This Option may not be exercised for a fraction of a Share. 
  
 (iv) In the event of Optionee’s death, disability or other termination of the employment or consulting
relationship, the exercisability of the Option is governed by Sections 7, 8 and 9 below, subject to the limitation contained in subsection 2(a)(v). 
  
 (v) In no event may this Option be exercised after the date of expiration of the term of this Option as set forth in the Notice of Grant.

  

 -12- 

 (b) Method of Exercise. This Option shall be exercisable by written notice (in the form attached
as Exhibit A) which shall state the election to exercise the Option, the number of Shares in respect of which the Option is being exercised, and such other representations and agreements with respect to such shares of Common Stock as may be
required by the Company pursuant to the provisions of the Plan. Such written notice shall be signed by the Optionee and, together with an executed copy of the Restricted Stock Purchase Agreement, if applicable, shall be delivered in person or by
certified mail to the Secretary of the Company. The written notice and Restricted Stock Purchase Agreement shall be accompanied by payment of the Exercise Price. This Option shall be deemed to be exercised upon receipt by the Company of such written
notice and Restricted Stock Purchase Agreement accompanied by the Exercise Price. 
  
 No Shares shall be issued pursuant to the exercise of an Option unless such issuance and such exercise shall comply with all relevant provisions of law and the requirements of any stock exchange upon which the Shares
may then be listed. Assuming such compliance, for income tax purposes the Shares shall be considered transferred to the Optionee on the date on which the Option is exercised with respect to such Shares. 
  
 3. Optionee’s Representations. In the event the Shares
purchasable pursuant to the exercise of this Option have not been registered under the Securities Act of 1933, as amended (the “Securities Act”), at the time this Option is exercised, Optionee shall, if required by the Company,
concurrently with the exercise of all or any portion of this Option, deliver to the Company his or her Investment Representation Statement in the form attached hereto as Exhibit B. 
  
 4. Lock-Up Period. Optionee hereby agrees that if so requested by the Company or any representative of the
underwriters (the “Managing Underwriter”) in connection with any registration of the offering of any securities of the Company under the Securities Act, Optionee shall not sell or otherwise transfer any Shares or other securities of the
Company during the one hundred eighty (180) day period (or such longer period as may be requested in writing by the Managing Underwriter and agreed to in writing by the Company) (the “Market Standoff Period”) following the effective date
of a registration statement of the Company filed under the Securities Act; provided, however, that such restriction shall apply only to the first registration statement of the Company to become effective under the Securities Act that includes
securities to be sold on behalf of the Company to the public in an underwritten public offering under the Securities Act. The Company may impose stop-transfer instructions with respect to securities subject to the foregoing restrictions until the
end of such Market Standoff Period. 
  
 5. Method of
Payment. Payment of the Exercise Price shall be by any of the following, or a combination thereof, at the election of the Optionee: 
  
 (a) cash; or 
  
 (b) check; or 
  
 (c) surrender of other shares of Common Stock of the Company which (i) in the case of Shares acquired pursuant to the exercise of a Company option, have
been owned by the Optionee for 
  

 -13- 

 more than six (6) months on the date of surrender, and (ii) have a Fair Market Value on the date of surrender equal to
the Exercise Price of the Shares as to which the Option is being exercised; or 
  
 (d) to the extent permitted by the Administrator, delivery of a properly executed exercise notice together with such other documentation as the Administrator and the broker, if applicable, shall require to effect an
exercise of the Option and delivery to the Company of the sale or loan proceeds required to pay the Exercise Price. 
  
 6. Restrictions on Exercise. This Option may not be exercised until such time as the Plan has been approved by the shareholders of the Company, or
if the issuance of such Shares upon such exercise or the method of payment of consideration for such shares would constitute a violation of any applicable federal or state securities or other law or regulation, including any rule under Part 207 of
Title 12 of the Code of Federal Regulations (“Regulation G”) as promulgated by the Federal Reserve Board. As a condition to the exercise of this Option, the Company may require Optionee to make any representation and warranty to the
Company as may be required by any applicable law or regulation. 
  
 7. Termination of Relationship. In the event an Optionee’s Continuous Status as an Employee or Consultant terminates, Optionee may, to the extent the Option was vested at the date of such termination (the “Termination
Date”), exercise this Option during the Termination Period set out in the Notice of Grant. To the extent that Optionee was not vested in this Option at the date of such termination, or if Optionee does not exercise this Option within the time
specified herein, the Option shall terminate. 
  
 8. Disability
of Optionee. Notwithstanding the provisions of Section 7 above, in the event of termination of an Optionee’s Continuous Status as an Employee or Consultant as a result of his or her disability, Optionee may, but only within twelve (12)
months from the date of such termination (and in no event later than the expiration date of the term of such Option as set forth in the Stock Option Agreement), exercise the Option to the extent the Option was vested at the date of such termination.
To the extent that Optionee is not vested in the Option at the date of termination, or if Optionee does not exercise such Option within the time specified herein, the Option shall terminate, and the Shares covered by such Option shall revert to the
Plan. 
  
 9. Death of Optionee. In the event of termination
of Optionee’s Continuous Status as an Employee or Consultant as a result of the death of Optionee, the Option may be exercised at any time within twelve (12) months following the date of death (but in no event later than the date of expiration
of the term of this Option as set forth in Section 11 below), by Optionee’s estate or by a person who acquires the right to exercise the Option by bequest or inheritance, but only to the extent the Option was vested at the date of death. To the
extent that Optionee is not vested in the Option at the date of death, or if the Option is not exercised within the time specified herein, the Option shall terminate, and the Shares covered by such Option shall revert to the Plan. 
  
 10. Non-Transferability of Option. This Option may not be transferred
in any manner otherwise than by will or by the laws of descent or distribution and may be exercised during the lifetime of Optionee only by Optionee. The terms of this Option shall be binding upon the executors, administrators, heirs, successors and
assigns of the Optionee. 
  

 -14- 

 11. Term of Option. This Option may be exercised only within the term set out in the Notice of
Grant, and may be exercised during such term only in accordance with the Plan and the terms of this Option. The limitations set out in Section 8 of the Plan regarding Options designated as ISOs and Options granted to more than ten percent (10%)
shareholders shall apply to this Option. 
  
 12. Tax
Consequences. Set forth below is a brief summary as of the date of this Option of some of the federal and state tax consequences of exercise of this Option and disposition of the Shares. THIS SUMMARY IS NECESSARILY INCOMPLETE, AND THE TAX LAWS
AND REGULATIONS ARE SUBJECT TO CHANGE. OPTIONEE SHOULD CONSULT A TAX ADVISER BEFORE EXERCISING THIS OPTION OR DISPOSING OF THE SHARES. 
  
 (a) Exercise of ISO. If this Option qualifies as an ISO, there will be no regular federal income tax liability or state income tax liability upon
the exercise of the Option, although the excess, if any, of the Fair Market Value of the Shares on the date of exercise over the Exercise Price will be treated as an adjustment to the alternative minimum tax for federal tax purposes and may subject
the Optionee to the alternative minimum tax in the year of exercise. 
  
 (b) Exercise of ISO Following Disability. If the Optionee’s Continuous Status as an Employee or Consultant terminates as a result of disability that is not total and permanent disability as defined in section 22(e)(3) of the
Code, to the extent permitted on the date of termination, the Optionee must exercise an ISO within ninety (90) days of such termination for the ISO to be qualified as an ISO. 
  
 (c) Exercise of NSO. There may be a regular federal income tax liability and state income tax liability upon the
exercise of an NSO. The Optionee will be treated as having received compensation income (taxable at ordinary income tax rates) equal to the excess, if any, of the Fair Market Value of the Shares on the date of exercise over the Exercise Price. If
Optionee is an Employee, the Company will be required to withhold from Optionee’s compensation or collect from Optionee and pay to the applicable taxing authorities an amount equal to a percentage of this compensation income at the time of
exercise. If the Optionee is subject to section 16 of the Securities Act of 1934, as amended, the date of income recognition may be deferred for up to six months. 
  
 (d) Disposition of Shares. In the case of an NSO, if Shares are held for the minimum long-term capital gain holding
period in effect at the time of disposition, any gain realized on disposition of the Shares will be treated as long-term capital gain for federal and state income tax purposes. In the case of an ISO, if Shares transferred pursuant to the Option are
held for the minimum long-term capital gain holding period in effect at the time of disposition (and provided such holding period includes at least one (1) year after exercise of the Option) and are disposed of at least two years after the Date of
Grant, any gain realized on disposition of the Shares will also be treated as long-term capital gain for federal and state income tax purposes. If Shares purchased under an ISO are disposed of after such one-year period following exercise, but
before the expiration of the minimum long-term capital gain holding period in effect at the time of disposition, then gain realized on such disposition may be taxed as a short-term capital gain, which may or may not be equivalent to taxation as
compensation income (taxable at ordinary income rates). If Shares purchased under an ISO are disposed of within such one-year period or within two years after the 
  

 -15- 

 Date of Grant, any gain realized on such disposition will be treated as compensation income to the extent of the
difference between the Exercise Price and the lesser of (i) the Fair Market Value of the Shares on the date of exercise, or (ii) the sale price of the Shares. 
  

(e) Notice of Disqualifying, Disposition of ISO Shares. If the Option granted to Optionee herein is an ISO, and if Optionee sells or otherwise
disposes of any of the Shares acquired pursuant to the ISO on or before the later of (i) the date two years after the Date of Grant, or (ii) the date one year after the date of exercise, the Optionee shall immediately notify the Company in writing
of such disposition. Optionee agrees that Optionee may be subject to income tax withholding by the Company on the compensation income recognized by the Optionee. 
  
 (f) Section 83(b) Election for Unvested Shares Purchased Pursuant to Nonstatutory Stock Options. With respect to the
exercise of a Nonstatutory Stock Option for unvested Shares, an election may be filed by the Optionee with the Internal Revenue Service and, if -necessary, the proper state taxing authorities, within thirty (30) days of the purchase of the
Shares, electing pursuant to section 83(b) of the Code (and similar state tax provisions if applicable) to be taxed currently on any difference between the purchase price of the Shares and their Fair Market Value on the date of purchase. This will
result in a recognition of taxable income to the Optionee on the date of exercise, measured by the excess, if any, of the fair market value of the Shares, at the time the Option is exercised over the purchase price for the Shares. Absent such an
election, taxable income will be measured and recognized by Optionee at the time or times on which the Company’s Repurchase Option lapses. Optionee is strongly encouraged to seek the advice of his or her own tax consultants in connection with
the purchase of the Shares and the advisability of filing of the Election under section 83(b) and similar tax provisions. A form of Election under section 83(b) is attached hereto as Exhibit C-5 for reference. 
  
 (g) Section 83(b) Election for Unvested Shares Purchased Pursuant to
Incentive Stock Options. With respect to the exercise of an Incentive Stock Option for unvested Shares, an election may be filed by the Optionee with the Internal Revenue Service and, if necessary, the proper state taxing authorities, within
thirty (30) days of the purchase of the Shares, electing pursuant to section 83(b) of the Code (and similar state tax provisions if applicable) to be taxed currently on any difference between the purchase price of the Shares and their Fair
Market Value on the date of purchase for alternative minimum tax purposes. This will result in a recognition of income to the Optionee on the date of exercise, for alternative minimum tax purposes, measured by the excess, if any, of the fair market
value of the Shares, at the time the option is exercised, over the purchase price for the Shares. Absent such an election, alternative minimum taxable income will be measured and recognized by Optionee at the time or times on which the
Company’s Repurchase Option lapses. Optionee is strongly encouraged to seek the advice of his or her tax consultants in connection with the purchase of the Shares and the advisability of filing of the Election under section 83(b) and similar
tax provisions. A form of Election under section 83(b) for alternative minimum tax purposes is attached hereto as Exhibit C-6 for reference. 
  

 -16- 

 OPTIONEE ACKNOWLEDGES THAT IT IS OPTIONEE’S SOLE RESPONSIBILITY AND NOT THE COMPANY’S TO FILE TIMELY THE
ELECTION UNDER SECTION 83(b), EVEN IF OPTIONEE REQUESTS THE COMPANY OR ITS REPRESENTATIVE TO MAKE THIS FILING ON OPTIONEE’S BEHALF. 
  

			
	 BRIGHTMAIL INCORPORATED

		
	 By
	 	

	 	 	Enrique Salem, President & CEO

  

 -17- 

 OPTIONEE ACKNOWLEDGES AND AGREES THAT THE VESTING OF SHARES PURSUANT TO THE OPTION HEREOF IS EARNED ONLY BY CONTINUING
CONSULTANCY OR EMPLOYMENT AT THE WILL OF THE COMPANY (NOT THROUGH THE ACT OF BEING HIRED, BEING GRANTED THIS OPTION OR ACQUIRING SHARES HEREUNDER). OPTIONEE FURTHER ACKNOWLEDGES AND AGREES THAT NOTHING IN THIS AGREEMENT, NOR IN THE COMPANY’S
1998 STOCK OPTION PLAN WHICH IS INCORPORATED HEREIN BY REFERENCE, SHALL CONFER UPON OPTIONEE ANY RIGHT WITH RESPECT TO CONTINUATION OF EMPLOYMENT OR CONSULTANCY BY THE COMPANY, NOR SHALL IT INTERFERE IN ANY WAY WITH OPTIONEE’S RIGHT OR THE
COMPANY’S RIGHT TO TERMINATE OPTIONEE’S EMPLOYMENT OR CONSULTANCY AT ANY TIME, WITH OR WITHOUT CAUSE. 
  
 Optionee acknowledges receipt of a copy of the Plan and represents that he is familiar with the terms and provisions thereof, and hereby accepts this
Option subject to all of the terms and provisions hereof. Optionee has reviewed the Plan and this Option in their entirety, has had an opportunity to obtain the advice of counsel prior to executing this Option and fully under-stands all provisions
of the Option. Optionee hereby agrees to accept as binding, conclusive and final all decisions or interpretations of the Administrator upon any questions arising under the Plan or this Option. Optionee further agrees to notify the Company upon any
change in the residence address indicated below. 
  

									
	 Dated:                 
	 	                                       
                                        
                                        
                          

				
	 	 	 	 	 Address:
	 	                                       
                                        
                                        
               

				
	 	 	 	 	 	 	                                      
                                        
                                        
     
				
	 	 	 	 	 	 	                                      
                                        
                                        
     

  
  

 EXHIBIT A 
  

1998 STOCK OPTION PLAN 
  
 EXERCISE NOTICE 
  
 Brightmail Incorporated 
 301 Howard Street, 18th Floor 
 San Francisco, CA 94105 
  
 1. Exercise of Option. Effective as of today
            ,             , the undersigned (“Optionee”) hereby elects to exercise Optionee’s option
to purchase              shares of the Common Stock (the “Shares”) of Brightmail Incorporated, a California corporation (the “Company”), under and pursuant to the
1998 Stock Option Plan (the “Plan”) and the ? Incentive ? Nonstatutory Stock Option Agreement             , dated
             (the “Option Agreement”). 
  
 2. Representations of Optionee. Optionee acknowledges that Optionee has received, read and understood the Plan and the Option Agreement and agrees
to abide by and be bound by their terms and conditions. 
  
 3.
Rights as Shareholder. Until the stock certificate evidencing such Shares is issued (as evidenced by the appropriate entry on the books of the Company or of a duly authorized transfer agent of the Company), no right to vote or receive
dividends or any other rights as a shareholder shall exist with respect to the Optioned Stock, notwithstanding the exercise of the Option. The Company shall issue (or cause to be issued) such stock certificate promptly after the Option is exercised.
No adjustment will be made for a dividend or other right for which the record date is prior to the date the stock certificate is issued, except as provided in Section 11 of the Plan. 
  
 Optionee shall enjoy rights as a shareholder until such time as Optionee disposes of the Shares or the Company and/or its
assignee(s) exercises the Right of First Refusal hereunder. Upon such exercise, Optionee shall have no further rights as a holder of the Shares so purchased except the right to receive payment for the Shares so purchased in accordance with the
pro-visions of this Agreement, and Optionee shall forthwith cause the certificate(s) evidencing the Shares so purchased to be surrendered to the Company for transfer or cancellation. 
  
 4. Company’s Right of First Refusal. Before any Shares held by Optionee or any transferee (either being
sometimes referred to herein as the “Holder”) may be sold or otherwise transferred (including transfer by gift or operation of law), the Company or its assignee(s) shall have a right of first refusal to purchase the Shares on the terms and
conditions set forth in this section (the “Right of First Refusal”). 
  
 (a) Notice of Proposed Transfer. The Holder of the Shares shall deliver to the Company a written notice (the “Notice”) stating: (i) the Holder’s bona fide intention to sell or otherwise transfer
such Shares; (ii) the name of each proposed purchaser or other transferee (“Proposed Transferee”); (iii) the number of Shares to be transferred to each Proposed Transferee; and (iv) the 
  

 A-1 

 bona fide cash price or other consideration for which the Holder proposes to transfer the Shares (the “Offered
Price”), and the Holder shall offer the Shares at the Offered Price to the Company or its assignee(s). 
  
 (b) Exercise of Right of First Refusal. At any time within thirty (30) days after receipt of the Notice, the Company and/or its assignee(s) may, by
giving written notice to the Holder, elect to purchase all, but not less than all, of the Shares proposed to be transferred to any one (1) or more of the Proposed Transferees, at the purchase price determined in accordance with subsection (c) below.

  
 (c) Purchase Price. The purchase price (“Purchase
Price”) for the Shares purchased by the Company or its assignee(s) under this section shall be the Offered Price. If the Offered Price includes consideration other than cash, the cash equivalent value of the non-cash consideration shall be
determined by the Board of Directors of the Company in good faith. 
  
 (d) Payment. Payment of the Purchase Price shall be made, at the option of the Company or its assignee(s), in cash (by check), by cancellation of all or a portion of any out-standing indebtedness of the Holder to the Company (or, in
the case of repurchase by an assignee, to the assignee), or by any combination thereof within thirty (30) days after receipt of the Notice or in the manner and at the times set forth in the Notice. 
  
 (e) Holder’s Right to Transfer. If all of the Shares proposed in
the Notice to be transferred to a given Proposed Transferee are not purchased by the Company and/or its assignee(s) as provided in this section, then the Holder may sell or otherwise transfer such Shares to that Proposed Transferee at the Offered
Price or at a higher price, provided that such sale or other transfer is consummated within one hundred twenty (120) days after the date of the Notice and provided further that any such sale or other transfer is effected in accordance with any
applicable securities laws and the Proposed Transferee agrees in writing that the provisions of this section shall continue to apply to the Shares in the hands of such Proposed Transferee. If the Shares described in the Notice are not transferred to
the Proposed Transferee within such period, a new Notice shall be given to the Company, and the Company and/or its assignees shall again be offered the Right of First Refusal as provided herein before any Shares held by the Holder may be sold or
otherwise transferred. 
  
 (f) Exception for Certain Family
Transfers. Anything to the contrary contained in this section notwithstanding, the transfer of any or all of the Shares during the Optionee’s lifetime or on the Optionee’s death by will or intestacy to the Optionee’s immediate
family or a trust for the benefit of the Optionee’s immediate family shall be exempt from the provisions of this section. “Immediate Family” as used herein shall mean spouse, lineal descendant or antecedent, father, mother, brother or
sister. In such case, the transferee or other recipient shall receive and hold the Shares so transferred subject to the provisions of this section, and there shall be no further transfer of such Shares except in accordance with the terms of this
section. 
  
 (g) Termination of Right of First Refusal. The
Right of First Refusal shall terminate as to any Shares ninety (90) days after the first sale of Common Stock of the Company to the general public pursuant to a registration statement filed with and declared effective by the Securities and Exchange
Commission under the Securities Act of 1933, as amended. 
  

 A-2 

 5. Tax Consultation. Optionee understands that Optionee may suffer adverse tax consequences as a
result of Optionee’s purchase or disposition of the Shares. Optionee represents that Optionee has consulted with any tax consultants Optionee deems advisable in connection with the purchase or disposition of the Shares and that Optionee is not
relying on the Company for any tax advice. 
  
 6. Restrictive
Legends and Stop-Transfer Orders. 
  
 (a) Legends. Optionee
understands and agrees that the Company shall cause the legends set forth below or legends substantially equivalent thereto, to be placed upon any certificate(s) evidencing ownership of the Shares together with any ‘other legends that may be
required by state or federal securities laws: 
  
 THE SECURITIES
REPRESENTED HEREBY HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933 (THE “ACT”) AND MAY NOT BE OFFERED, SOLD OR OTHERWISE TRANSFERRED, PLEDGED OR HYPOTHECATED UNLESS AND UNTIL REGISTERED UNDER THE ACT OR, IN THE OPINION OF COUNSEL
IN FORM AND SUBSTANCE SATISFACTORY TO THE ISSUER OF THESE SECURITIES, SUCH OFFER, SALE OR TRANSFER, PLEDGE OR HYPOTHECATION IS IN COMPLIANCE THEREWITH. 
  
 THE SHARES REPRESENTED BY THIS CERTIFICATE ARE SUBJECT TO CERTAIN RESTRICTIONS ON TRANSFER AND RIGHT OF FIRST REFUSAL OPTIONS HELD BY THE ISSUER OR ITS
ASSIGNEE(S) AS SET FORTH IN THE EXERCISE NOTICE BETWEEN THE ISSUER AND THE ORIGINAL HOLDER OF THESE SHARES, A COPY OF WHICH MAY BE OBTAINED AT THE PRINCIPAL OFFICE OF THE ISSUER. SUCH TRANSFER RESTRICTIONS AND RIGHT OF FIRST REFUSAL ARE BINDING ON
TRANSFEREES OF THESE SHARES. 
  
 (b) Stop-Transfer Notices.
Optionee agrees that, in order to ensure compliance with the restrictions referred to herein, the Company may issue appropriate “stop transfer” instructions to its transfer agent, if any, and that, if the Company transfers its own
securities, it may make appropriate notations to the same effect in its own records. 
  
 (c) Refusal to Transfer. The Company shall not be required (i) to transfer on its books any Shares that have been sold or otherwise transferred in violation of any of the provisions of this Agreement or (ii) to
treat as owner of such Shares or to accord the right to vote or pay dividends to any purchaser or other transferee to whom such Shares shall have been so transferred. 
  
 7. Successors and Assigns. The Company may assign any of its rights under this Agreement to single or multiple
assignees, and this Agreement shall inure to the benefit of the successors and assigns of the Company. Subject to the restrictions on transfer herein set forth, this Agreement shall be binding upon Optionee and his or her heirs, executors,
administrators, successors and assigns. 
  

 A-3 

 8. Interpretation. Any dispute regarding the interpretation of this Agreement shall be submitted
by Optionee or by the Company forthwith to the Company’s Board of Directors or the committee thereof that administers the Plan, which shall review such dispute at its next regular meeting. The resolution of such a dispute by the Board or
committee shall be final and binding on the Company and on Optionee. 
  
 9. Governing Law; Severability. This Agreement shall be governed by and construed in accordance with the laws of the State of California excluding that body of law pertaining to conflicts of law. Should any provision of this
Agreement be determined by a court of law to be illegal or unenforceable, the other provisions shall nevertheless remain effective and shall remain enforceable. 
  

10. Notices. Any notice required or permitted hereunder shall be given in writing and shall be deemed effectively given upon personal delivery
or upon deposit in the United States mail by certified mail, with postage and fees prepaid, addressed to the other party at its address as shown below beneath its signature, or to such other address as such party may designate in writing from time
to time to the other party. 
  
 11. Further Instruments.
The parties agree to execute such further instruments and to take such further action as may be reasonably necessary to carry out the purposes and intent of this Agreement. 
  
 12. Delivery of Payment. Optionee herewith delivers to the Company the full Exercise Price for the Shares.

  
 13. Entire Agreement. The Plan and Notice of
Grant/Option Agreement are incorporated herein by reference. This Agreement, the Plan, the Option Agreement, the Restricted Stock Purchase Agreement, and the Investment Representation Statement constitute the entire agreement of the parties and
supersede in their entirety all prior undertakings and agreements of the Company and Optionee with respect to the subject matter hereof. 
  

							
	 Submitted by:
	 	 	 	 Accepted by:

			
	 OPTIONEE:
	 	 	 	 BRIGHTMAIL INCORPORATED

				
	 	 	 	 	By	 	 
	
	 	 	 	 	 	

				
	 Address:
	 	 	 	Name	 	 
	 	 	 	 	 	 	

				
	 	 	 	 	 Title
	 	 
	
	 	 	 	 	 	

	 	 	 	 	 	 	 
	
	 	 	 	 	 	 
	 	 	 	 	 	 	 
	
	 	 	 	 	 	 

  
  
  
  
  

 A-4 

 EXHIBIT B 
  

INVESTMENT REPRESENTATION STATEMENT 
  

			
	OPTIONEE:	  	                                      
                                        
                                        
                                        
                                        
                      
		
	COMPANY:	  	BRIGHTMAIL INCORPORATED
		
	SECURITY	  	COMMON STOCK
		
	AMOUNT:	  	                                      
                                        
                                        
                                        
                                        
                      
		
	DATE:	  	                                      
                                        
                                        
                                        
                                        
                      

  
 In connection with the
purchase of the above-listed Securities, the undersigned Optionee represents to the Company the following: 
  
 (a) Optionee is aware of the Company’s business affairs and financial condition and has acquired sufficient information about the Company to reach an
informed and knowledgeable decision to acquire the Securities. Optionee is acquiring these Securities for investment for Optionee’s own account only and not with a view to, or for resale in connection with, any “distribution” thereof
within the meaning of the Securities Act of 1933, as amended (the “Securities Act”). 
  
 (b) Optionee acknowledges and understands that the Securities constitute “restricted securities” under the Securities Act and have not been registered under the Securities Act in reliance upon a specific
exemption therefrom, which exemption depends upon, among other things, the bona fide nature of Optionee’s investment intent as expressed herein. In this connection, Optionee understands that, in the view of the Securities and Exchange
Commission, the statutory basis for such exemption may be unavailable if Optionee’s representation was predicated solely upon a present intention to hold these Securities for the minimum capital gains period specified under tax statutes, for a
deferred sale, for or until an increase or decrease in the market price of the Securities, or for a period of one year or any other fixed period in the future. Optionee further understands that the Securities must be held indefinitely unless they
are subsequently registered under the Securities Act or an exemption from such registration is available. Optionee further acknowledges and understands that the Company is under no obligation to register the Securities. Optionee understands that the
certificate evidencing the Securities will be imprinted with a legend which prohibits the transfer of the Securities unless they are registered or such registration is not required in the opinion of counsel satisfactory to the Company and any other
legend required under applicable state securities laws. 
  

	(c)	Optionee is familiar with the provisions of Rule 701 and Rule 144, each promulgated under the Securities Act, which, in substance, permit limited public resale of “restricted
securities” acquired, directly or indirectly from the issuer thereof, in a non-public offering subject to the satisfaction of certain conditions. Rule 701 provides that if the issuer qualifies under Rule 701 at the 

  

 B-1 

 time of the grant of the Option to the Optionee, the exercise will be exempt from registration under the Securities Act.
In the event the Company becomes subject to the reporting requirements of section 13 or 15(d) of the Securities Exchange Act of 1934, ninety (90) days thereafter (or such longer period as any market stand-off agreement may require) the Securities
exempt under Rule 701 may be resold, subject to the satisfaction of certain of the conditions specified by Rule 144, including: (i) the resale being made through a broker in an unsolicited “broker’s transaction” or in transactions
directly with a market maker (as said term is defined under the Securities Exchange Act of 1934); and, in the case of an affiliate, (ii) the availability of certain public information about the Company, (iii) the amount of Securities being sold
during any three month period not exceeding the limitations specified in Rule 144(e), and (iv) the timely filing of a Form 144, if applicable. 
  
 In the event that the Company does not qualify under Rule 701 at the time of grant of the Option, then the Securities may be resold in certain limited
circumstances subject to the provisions of Rule 144, which requires the resale to occur not less than one year after the later of the date the Securities were sold by the Company or the date the Securities were sold by an affiliate of the Company,
within the meaning of Rule 144; and, in the case of acquisition of the Securities by an affiliate, or by a non-affiliate who subsequently holds the Securities less than two (2) years, the satisfaction of the conditions set forth in sections (i),
(ii), (iii) and (iv) of the paragraph immediately above. 
  
 (d)
Optionee further understands that in the event all of the applicable requirements of Rule 701 or 144 are not satisfied, registration under the Securities Act, compliance with Regulation A, or some other registration exemption will be required; and
that, notwithstanding the fact that Rules 144 and 701 are not exclusive, the Staff of the Securities and Exchange Commission has expressed its opinion that persons proposing to sell private placement securities other than in a registered offering
and otherwise than pursuant to Rules 144 or 701 will have a substantial burden of proof in establishing that an exemption from registration is available for such offers or sales, and that such persons and their respective brokers who participate in
such transactions do so at their own risk. Optionee understands that no assurances can be given that any such other registration exemption will be available in such event. 
  
 Dated:
                 
  

									
	 	 	 	 	 
	 	 	 	 	 	 	 	 	 
	 	 	 	 	 	 	 	 	

	 	 	 	 	 	 	 	 	Signature of Optionee

  
  
  

 B-2 

 EXHIBIT C-1 
  
 1998 STOCK OPTION PLAN 
  
 RESTRICTED STOCK PURCHASE AGREEMENT 
  
 THIS AGREEMENT is made between
                             (the “Purchaser”) and Brightmail Incorporated, a California
corporation (the “Company”), as of             , 2004. 
  
 RECITALS: 
  
 (1) Pursuant to the exercise of the stock option granted to Purchaser under the Company’s 1998 Stock Option Plan and pursuant to the Stock Option
Agreement (the “Option Agreement”) dated by and between the Company and Purchaser with respect to such grant, which Option Agreement is hereby incorporated by reference, Purchaser has elected to purchase of those shares which have not
become vested under the vesting schedule set forth in the Option Agreement (“Unvested Shares”). The Unvested Shares and the shares subject to the Option Agreement which have become vested are sometimes collectively referred to herein as
the “Shares.” 
  
 (2) As required by the Option
Agreement, as a condition to Purchaser’s election to exercise the option, Purchaser must execute this Restricted Stock Purchase Agreement, which sets forth the rights and obligations of the parties with respect to Shares acquired upon exercise
of the Option. 
  
 1. Repurchase Option. 
  
 (a) If Purchaser’s employment or consulting relationship with the
Company is terminated for any reason, including for cause, death, and disability, the Company shall have the right and option to purchase from Purchaser, or Purchaser’s personal representative, as the case may be, all of the Purchaser’s
Unvested Shares as of the date of such termination at the price paid by the Purchaser for such Shares (the “Repurchase Option”). 
  
 (b) Upon the occurrence of a termination, the Company may exercise its Repurchase Option by delivering personally or by registered mail, to Purchaser (or
his transferee or legal representative, as the case may be), within ninety (90) days of the termination, a notice in writing indicating the Company’s intention to exercise the Repurchase Option and setting forth a date for closing not later
than thirty (30) days from the mailing of such notice. The closing shall take place at the Company’s office. At the closing, the holder of the certificates for the Unvested Shares being transferred shall deliver the stock certificate or
certificates evidencing the Unvested Shares, and the Company shall deliver the purchase price therefor. 
  
 (c) At its option, the Company may elect to make payment for the Unvested Shares to a bank selected by the Company. The Company shall avail itself of this
option by a notice in writing to Purchaser stating the name and address of the bank, date of closing, and waiving the closing at the Company’s office. 
  

 C-1-1 

 (d) If the Company does not elect to exercise the Repurchase Option conferred above by giving the
requisite notice within ninety (90) days following the termination, the Repurchase Option shall terminate. 
  
 2. Transferability of the Shares, Escrow. 
  
 (a) Purchaser hereby authorizes and directs the secretary of the Company, or such other person designated by the Company, to transfer the Unvested Shares
as to which the Repurchase Option has been exercised from Purchaser to the Company. 
  
 (b) To insure the availability for delivery of Purchaser’s Unvested Shares upon repurchase by the Company pursuant to the Repurchase Option under Section 1, Purchaser hereby appoints the secretary, or any other
person designated by the Company as escrow agent, as its attorney-in-fact to sell, assign and transfer unto the Company, such Unvested Shares, if any, repurchased by the Company pursuant to the Repurchase Option and shall, upon execution of this
Agreement, deliver and deposit with the secretary of the Company, or such other person designated by the Company, the share certificates representing the Unvested Shares, together with the stock assignment duly endorsed in blank, attached hereto as
Exhibit C-2. The Unvested Shares and stock assignment shall be held by the secretary in escrow, pursuant to the Joint Escrow Instructions of the Company and Purchaser attached as Exhibit C-3 hereto, until the Company exercises its
Repurchase Option as provided in Section 1, until such Unvested Shares are vested, or until such time as this Agreement no longer is in effect. As a further condition to the Company’s obligations under this Agreement, the spouse of the
Purchaser, if any, shall execute and deliver to the Company the Consent of Spouse attached hereto as Exhibit C-4. Upon vesting of the Unvested Shares, the escrow agent shall promptly deliver to the Purchaser the certificate or certificates
representing such Shares in the escrow agent’s possession belonging to the Purchaser, and the escrow agent shall be discharged of all further obligations hereunder; provided, however, that the escrow agent shall nevertheless retain such
certificate or certificates as escrow agent if so required pursuant to other restrictions imposed pursuant to this Agreement. 
  
 (c) The Company, or its designee, shall not be liable for any act it may do or omit to do with respect to holding the Shares in escrow and while acting in
good faith and in the exercise of its judgment. 
  
 (d) Transfer
or sale of the Shares is subject to restrictions on transfer imposed by any applicable state and federal securities laws. Any transferee shall hold such Shares subject to all the provisions hereof and the Exercise Notice executed by the Purchaser
with respect to any Unvested Shares purchased by Purchaser and shall acknowledge the same by signing a copy of this Agreement. 
  
 3. Ownership, Voting Rights, Duties. This Agreement shall not affect in any way the ownership, voting rights or other rights or duties of
Purchaser, except as specifically provided herein. 
  

 C-1-2 

 4. Legends. The share certificate evidencing the Shares issued hereunder shall be endorsed with
the following legend (in addition to any legend required under applicable state securities laws): 
  
 THE SHARES REPRESENTED BY THIS CERTIFICATE ARE SUBJECT TO CERTAIN RESTRICTIONS UPON TRANSFER AND RIGHTS OF REPURCHASE AS SET FORTH IN AN AGREEMENT BETWEEN
THE COMPANY AND THE SHAREHOLDER, A COPY OF WHICH IS ON FILE WITH THE SECRETARY OF THE COMPANY. 
  
 5. Adjustment for Stock Split. All references to the number of Shares and the purchase price of the Shares in this Agreement shall be appropriately adjusted to reflect any stock split, stock dividend or other
change in the Shares which may be made by the Company after the date of this Agreement. 
  
 6. Notices. Notices required hereunder shall be given in person or by registered mail to the address of Purchaser shown on the records of the Company, and to the Company at its principal executive office.

  
 7. Survival of Terms. This Agreement shall apply to and
bind Purchaser and the Company and their respective permitted assignees and transferees, heirs, legatees, executors, administrators and legal successors. 
  
 8. 83(b) Elections. 
  
 (a) Election for Unvested Shares Purchased Pursuant to Nonstatutory Stock Options. Purchaser hereby acknowledges that he or she has been informed
that, with respect to the exercise of a Nonstatutory Stock Option for Unvested Shares, that unless an election is filed by the Purchaser with the Internal Revenue Service and, if necessary, the proper state taxing authorities, within thirty (30)
days of the purchase of the Shares, electing pursuant to section 83(b) of the Code (and similar state tax provisions if applicable) to be taxed currently on any difference between the purchase price of the Shares and their Fair Market Value on the
date of purchase, there will be a recognition of taxable income to the Optionee, measured by the excess, if any, of the fair market value of the Shares, at the time the Company’s Repurchase Option lapses over the purchase price for the Shares.
Optionee represents that Optionee has consulted any tax consultant(s) Optionee deems advisable in connection with the purchase of the Shares or the filing of the Election under section 83(b) and similar tax provisions. A form of Election under
section 83(b) is attached hereto as Exhibit C-5 for reference. 
  
 (b) Election for Unvested Shares Purchased Pursuant to Incentive Stock Options. Purchaser hereby acknowledges that he or she has been informed that, with respect to the exercise of an Incentive Stock Option for Unvested Shares, that
unless an election is filed by the Purchaser with the Internal Revenue Service and, if necessary, the proper state taxing authorities, within thirty (30) days of the purchase of the Shares, electing pursuant to section 83(b) of the Code (and similar
state tax provisions if applicable) to be taxed currently on any difference between the purchase price of the Shares and their Fair Market Value on the date of purchase, there will be a recognition of income to the Optionee, for alternative minimum
tax purposes, measured by the excess, if any, of the 
  

 C-1-3 

 fair market value of the Shares, at the time the Company’s Repurchase Option lapses over the purchase price for the
Shares. Optionee represents that Optionee has consulted any tax consultant(s) Optionee deems advisable in connection with the purchase of the Shares or the filing of the Election under section 83(b) and similar tax provisions. A form of Election
under section 83(b) for alternative minimum tax purposes is attached hereto as Exhibit C-6 for reference. 
  
 PURCHASER ACKNOWLEDGES THAT IT IS PURCHASER’S SOLE RESPONSIBILITY AND NOT THE COMPANY’S TO FILE TIMELY THE ELECTION UNDER SECTION 83(b), EVEN IF
PURCHASER REQUESTS THE COMPANY OR ITS REPRESENTATIVE TO MAKE THIS FILING ON PURCHASER’S BEHALF. 
  
 9. Representations. Purchaser has reviewed with his own tax advisors the federal, state, local and foreign tax consequences of this investment and
the transactions contemplated by this Agreement. Purchaser is relying solely on such advisors and not on any statements or representations of the Company or any of its agents. Purchaser understands that he (and not the Company) shall be responsible
for his own tax liability that may arise as a result of this investment or the transactions contemplated by this Agreement. 
  
 10. Governing Law. This Agreement shall be governed by and construed and enforced in accordance with applicable state laws. 
  
 Purchaser represents that he has read this Agreement and is familiar with its
terms and provisions. Purchaser hereby agrees to accept as binding, conclusive and final all decisions or interpretations of the Board upon any questions arising under this Agreement. 
  
 IN WITNESS WHEREOF, this Agreement is deemed made as of the date first set forth above. 
  

									
	 	 	 	 	COMPANY
			
	 	 	 	 	BRIGHTMAIL INCORPORATED
				
	 	 	 	 	 	 	By
                                        
                                        
                                    
				
	 	 	 	 	 	 	 Title:
                                        
                                        
                               

				
	 	 	 	 	 	 	PURCHASER
				
	 	 	 	 	 	 	  
                                       
                                        
                                        
     

				
	 	 	 	 	 	 	 Address:                                     
                                        
                               

	 	 	 	 	 	 	                                       
                                        
                               

  
  
  
  
  
  

 C-1-4 

 EXHIBIT C-2 
  
 ASSIGNMENT SEPARATE FROM CERTIFICATE 
  
 FOR VALUE RECEIVED I,
                                        
                    , hereby sell, assign and transfer unto
                             shares of the Common Stock of Brightmail Incorporated standing in my name
of the books of said corporation represented by Certificate No.              herewith and do hereby irrevocably constitute and appoint
                                     to transfer the said
stock on the books of the within named corporation with full power of substitution in the premises. 
  
 This Stock Assignment may be used only in accordance with the Restricted Stock Purchase Agreement between Brightmail Incorporated and the undersigned
dated             ,         . 
  
 Dated:             ,
         
  

	
	 
	

	Signature

  
 INSTRUCTIONS:
Please do not fill in any blanks other than the signature line. The purpose of this assignment is to enable the Company to exercise its “repurchase option,” as set forth in the Agreement, without requiring additional signatures on the
part of the Purchaser. 
  
  

 C-2-1 

 EXHIBIT C-3 
  
 JOINT ESCROW INSTRUCTIONS 
  
             ,          
  
 Secretary of the Company 
 Brightmail Incorporated 
 301 Howard Street, 18th Floor 
 San Francisco, CA 94105 
  
 Dear Secretary: 
  
 As Escrow Agent for both Brightmail Incorporated, a California corporation
(the “Company”), and the undersigned purchaser of stock of the Company (the “Purchaser”), you are hereby authorized and directed to hold the documents delivered to you pursuant to the terms of that certain Restricted Stock
Purchase Agreement (“Agreement”) between the Company and the undersigned, in accordance with the following instructions: 
  
 1. In the event the Company and/or any assignee of the Company (referred to collectively for convenience herein as the “Company”) exercises the
Company’s repurchase option set forth in the Agreement, the Company shall give to Purchaser and you a written notice specifying the number of shares of stock to be purchased, the purchase price, and the time for a closing hereunder at the
principal office of the Company. Purchaser and the Company hereby irrevocably authorize and direct you to close the transaction contemplated by such notice in accordance with the terms of said notice. 
  
 2. At the closing, you are directed (a) to date the stock assignments
necessary for the transfer in question, (b) to fill in the number of shares being transferred, and (c) to deliver the same, together with the certificate evidencing the shares of stock to be transferred, to the Company or its assignee, against the
simultaneous delivery to you of the purchase price (by cash, a check, or some combination thereof) for the number of shares of stock being purchased pursuant to the exercise of the Company’s repurchase option. 
  
 3. Purchaser irrevocably authorizes the Company to deposit with you any
certificates evidencing shares of stock to be held by you hereunder and any additions and substitutions to said shares as defined in the Agreement. Purchaser does hereby irrevocably constitute and appoint you as Purchaser’s attorney-in-fact and
agent for the term of this escrow to execute with respect to such securities all documents necessary or appropriate to make such securities negotiable and to complete any transaction herein contemplated, including but not limited to the filing with
any applicable state blue sky authority of any required applications for consent to, or notice of transfer of, the securities. Subject to the provisions of this paragraph 3, Purchaser shall exercise all rights and privileges of a shareholder of the
Company while the stock is held by you. 
  

 C-3-1 

 4. Upon written request of the Purchaser, but no more than once per calendar year, unless the
Company’s repurchase option has been exercised, you will deliver to Purchaser a certificate or certificates representing so many shares of stock as are not then subject to the Company’s repurchase option. Within 120 days after cessation of
Purchaser’s continuous employment by or services to the Company, or any parent or subsidiary of the Company, you will deliver to Purchaser a certificate or certificates representing the aggregate number of shares held or issued pursuant to the
Agreement and not purchased by the Company or its assignees pursuant to exercise of the Company’s repurchase option. 
  
 5. If at the time of termination of this escrow you should have in your possession any documents, securities, or other property belonging to Purchaser,
you shall deliver all of the same to Purchaser and shall be discharged of all further obligations hereunder. 
  
 6. Your duties hereunder may be altered, amended, modified or revoked only by a writing signed by all of the parties hereto. 
  
 7. You shall be obligated only for the performance of such duties as are
specifically set forth herein and may rely and shall be protected in relying or refraining from acting on any instrument reasonably believed by you to be genuine and to have been signed or presented by the proper party or parties. You shall not be
personally liable for any act you may do or omit to do hereunder as Escrow Agent or as attorney-in-fact for Purchaser while acting in good faith, and any act done or omitted by you pursuant to the advice of your own attorneys shall be conclusive
evidence of such good faith. 
  
 8. You are hereby expressly
authorized to disregard any and all warnings given by any of the parties hereto or by any other person or corporation, excepting only orders or process of courts of law and are hereby expressly authorized to comply with and obey orders, judgments or
decrees of any court. In case you obey or comply with any such order, judgment or decree, you shall not be liable to any of the parties hereto or to any other person, firm or corporation by reason of such compliance, notwithstanding any such order,
judgment or decree being subsequently reversed, modified, annulled, set aside, vacated or found to have been entered without jurisdiction. 
  
 9. You shall not be liable in any respect on account of the identity, authorities or rights of the parties executing or delivering or purporting to
execute or deliver the Agreement or any documents or papers deposited or called for hereunder. 
  
 10. You shall not be liable for the outlawing of any rights under the Statute of Limitations with respect to these Joint Escrow Instructions or any documents deposited with you. 
  
 11. You shall be entitled to employ such legal counsel and other experts as
you may deem necessary properly to advise you in connection with your obligations hereunder, may rely upon the advice of such counsel, and may pay such counsel reasonable compensation therefor. 
  
 12. Your responsibilities as Escrow Agent hereunder shall terminate if you
shall cease to be an officer or agent of the Company or if you shall resign by written notice to each party. In the event of any such termination, the Company shall appoint a successor Escrow Agent. 
  

 C-3-2 

 13. If you reasonably require other or further instruments in connection with these Joint Escrow
Instructions or obligations in respect hereto, the necessary parties hereto shall join in furnishing such instruments. 
  
 14. It is understood and agreed that should any dispute arise with respect to the delivery and/or ownership or right of possession of the securities held
by you hereunder, you are authorized and directed to retain in your possession without liability to anyone all or any part of said securities until such disputes shall have been settled either by mutual written agreement of the parties concerned or
by a final order, decree or judgment of a court of competent jurisdiction after the time for appeal has expired and no appeal has been perfected, but you shall be under no duty whatsoever to institute or defend any such proceedings. 
  
 15. Any notice required or permitted hereunder shall be given in writing and
shall be deemed effectively given upon personal delivery or upon deposit in the United States Post Office, by registered or certified mail with postage and fees prepaid, addressed to each of the other parties thereunto entitled at the following
addresses or at such other addresses as a party may designate by ten (10) days advance written notice to each of the other parties hereto. 
  

			
	 Company:
	  	 Brightmail Incorporated
 Attn: Secretary
 301 Howard Street, 18th Floor
 San Francisco, CA 94105

		
	 Purchaser:
	  	                                      
                                        
        
	 	  	                                      
                                        
        
	 	  	                                      
                                        
        
	 	  	                                      
                                        
        
		
	 Escrow Agent:
	  	 Secretary of the Company
 Brightmail
Incorporated
 301 Howard Street, 18th Floor
 San Francisco, CA
94105

  
 16. By signing these
Joint Escrow Instructions, you become a party hereto only for the purpose of said Joint Escrow Instructions; you do not become a party to the Agreement. 
  
 17. This instrument shall be binding upon and inure to the benefit of the parties hereto, and their respective successors and permitted assigns.

  

 C-3-3 

 18. These Joint Escrow Instructions shall be governed by, and construed and enforced in accordance with,
the laws of the State of California. 
  

			
	 BRIGHTMAIL INCORPORATED

		
	 By
	 	 
	 	 	

		
	 Title
	 	 
	 	 	

	
	  
 PURCHASER
  

	  

  

			
	  
 ESCROW
AGENT

	
	  

	Secretary

  
  
  
  
  

 C-3-4 

 EXHIBIT C-4 
  
 CONSENT OF SPOUSE 
  
 I,
                                        
                                        
    , spouse of
                                        
                                    , have read and approve the
foregoing Agreement. In consideration of granting of the right to my spouse to purchase shares of Brightmail Incorporated as set forth in the Agreement, I hereby appoint my spouse as my attorney-in-fact in respect to the exercise of any rights under
the Agreement and agree to be bound by the provisions of the Agreement insofar as I may have any rights in said Agreement or any shares issued pursuant thereto under the community property laws or similar laws relating to marital property in effect
in the state of our residence as of the date of the signing of the foregoing Agreement. 
  
 Dated:                         ,
             
  
                                       
                                        
                                        
                   
  

 C-4-1 

 EXHIBIT C-5 
  
 ELECTION UNDER SECTION 83(b) 
  

OF THE INTERNAL REVENUE CODE OF 1986 
  
 The undersigned taxpayer hereby elects, pursuant to section 83(b) of the Internal Revenue Code of 1986, as amended, to include in taxpayer’s gross
income for the current taxable year the amount of any compensation taxable to taxpayer in connection with taxpayer’s receipt of the property described below: 
  

	1.	The name, address, taxpayer identification number and taxable year of the undersigned are as follows: 

  

			
	 Name:
	  	 Taxpayer:
                                        
                                        
  

		
	 	  	 Spouse:
                                        
                                        
     

		
	 Address:
	  	                                       
                                        
                     

		
	 	  	                                       
                                        
                     

		
	 Identification No.:
	  	 Taxpayer:
                                        
                                        
  
 Spouse:
                                        
                                        
     

		
	 Taxable Year:
	  	                                       
                                        
                     

  

	2.	The property with respect to which the election is made is described as follows:  

	    	                         shares (the
“Shares”) of the Common Stock of Brightmail Incorporated (the “Company”). 

  

	3.	The date on which the property was transferred is:
                        ,          

  

	4.	The property is subject to the following restrictions: 

  

	    	The Shares may not be transferred and are subject to forfeiture under the terms of an agreement between the taxpayer and the Company. These restrictions lapse upon the satisfaction
of certain conditions contained in such agreement. 

  

	5.	The fair market value at the time of transfer, determined without regard to any restriction other than a restriction which by its terms will never lapse, of such property is:
$                . 

  

	6.	The amount (if any) paid for such property is: $                . 

  
 The undersigned has submitted a copy of this statement to the person for whom the services
were performed in connection with the undersigned’s receipt of the above-described property. The transferee of such property is the person performing the services in connection with the transfer of said property. 
  

 C-5-1 

 The undersigned understands that the foregoing election may not be revoked except with the consent of the
Commissioner. 
  

									
	 Dated:
                        ,          
	 	 	 	 	 	 
	 	 	 	 	 	 	 	

	 	 	 	 	Taxpayer

  
 The undersigned spouse of taxpayer
joins in this election. 
  

									
	 	 	 	 	 
				
	 Dated:
                        ,          
	 	 	 	 	 	 
	 	 	 	 	 	 	 	

	 	 	 	 	 	 	 	 	Spouse of Taxpayer

  
  
  

 C-5-2 

 EXHIBIT C-6 
  
 ELECTION UNDER SECTION 83(b) 
  

OF THE INTERNAL REVENUE CODE OF 1986 
  
 The undersigned taxpayer hereby elects, pursuant to the provisions of sections 55-56 and 83(b) of the Internal Revenue Code of 1986, as amended, to
include in taxpayer’s alternative minimum taxable income for the current taxable year, as compensation for services, the excess, if any, of the fair market value of the property described below at the time of transfer over the amount paid for
such property. 
  

	1.	The name, address, taxpayer identification number and taxable year of the undersigned are as follows: 

  

			
	 Name:
	  	 Taxpayer:
                                        
                                        
  

	 	  	 Spouse:
                                        
                                        
     

		
	 Address:
	  	                                       
                                        
                     

		
	 	  	                                       
                                        
                     

		
	 Identification No.:
	  	 Taxpayer:
                                        
                                        
  
 Spouse:
                                        
                                        
     

		
	 Taxable Year:
	  	                                       
                                        
                      

  

	2.	The property with respect to which the election is made is described as follows: 

	    	                     shares (the “Shares”) of the Common Stock
of Brightmail Incorporated (the “Company”). 

  

	3.	The date on which the property was transferred is:                     .

  

	4.	The property is subject to the following restrictions: 

  

	    	The Shares may be repurchased by the Company, or its assignee, at its original purchase price, on certain events. This right lapses with regard to a portion of the Shares over time.

  

	5.	The fair market value at the time of transfer, determined without regard to any restriction other than a restriction which by its terms will never lapse, of such property is:
$                . 

  

	6.	The amount paid for such property is: $                . 

  
 The undersigned has submitted a copy of this statement to the person for whom the services
were performed in connection with the undersigned’s receipt of the above-described property. The transferee of such property is the person performing the services in connection with the transfer of said property. 
  

 C-6-1 

 The undersigned understands that the foregoing election may not be revoked except with the consent of the
Commissioner. 
  

									
				
	 Dated:
                        ,          
	 	 	 	 	 	 
	 	 	 	 	 	 	 	

	 	 	 	 	 	 	 	 	Taxpayer

  
 The undersigned spouse of taxpayer
joins in this election. 
  

									
	 	 	 	 	 
				
	 Dated:
                        ,          
	 	 	 	 	 	 
	 	 	 	 	 	 	 	

	 	 	 	 	 	 	 	 	Spouse of Taxpayer

  
  
  

 C-6-2Employment Agreement, dated March 11, 2002

  
 Exhibit 10.5

  
 BRIGHTMAIL, INC. 
  
 EMPLOYMENT AGREEMENT 
  
 This Employment Agreement is entered into as of March 11, 2002, by and
between Brightmail, Inc., a California corporation (the “Company”), and Enrique Salem (the “Executive”). 
  
 WHEREAS, the Company desires to employ the Executive effective as of a date no later than April 15, 2002 (the “Effective Date”) and the
Executive desires to accept employment with the Company to commence on the Effective Date, on the terms and conditions set forth below; 
  
 NOW, THEREFORE, in consideration of the foregoing recital and the respective covenants and agreements of the parties contained in this document, the
Company and the Executive agree as follows: 
  
 1. Employment
and Duties. The Executive’s term of employment under this Agreement shall commence on the date hereof. The period of time during which the Executive is employed by the Company is referred to herein as the “Employment
Period.” During the Employment Period, the Executive will serve as the President and Chief Executive Officer of the Company. The duties and responsibilities of the Executive shall include the duties and responsibilities for the
Executive’s corporate offices and positions as set forth in the Company’s bylaws from time to time in effect and such other duties and responsibilities as the board of directors of the Company (the “Board of Directors”)
may from time to time reasonably assign to the Executive, in all cases to be consistent with the Executive’s corporate offices and positions. The Executive shall perform faithfully the executive duties assigned to him to the best of his
ability. At the next meeting of the Board of Directors, the Executive will be nominated to serve as a director of the Company, and, if elected, the Executive shall serve in such capacity without additional compensation. 
  
 2. At-Will Employment. The Company and the Executive agree and
acknowledge that the Executive’s employment with the Company constitutes “at-will” employment and that this Agreement may be terminated at any time for any reason or no reason by the Company or the Executive, subject to the severance
provisions set forth in Section 10 herein. 
  
 3. Place
of Employment. The Executive’s services shall be performed at the Company’s principal executive offices in San Francisco, California. The parties acknowledge, however, that the Executive may be required to travel in connection with the
performance of his duties hereunder. 
  
 4. Base Salary.
For all services to be rendered by the Executive pursuant to this Agreement, the Company agrees to pay the Executive during the Employment Period a base salary (the “Base Salary”) at an annualized rate of $240,000. The Base Salary
shall be paid in periodic installments in accordance with the Company’s regular payroll practices. The Company agrees to review the Base Salary at least annually and to make such increases therein as the Board of Directors may approve.

  
 5. Bonus. Beginning with the Company’s 2002 fiscal
year and for each fiscal year thereafter during the Employment Period, the Executive will be eligible to receive an annual bonus (the “Bonus”) of up to 50% of the Executive’s Base Salary for such fiscal year (which for 2002
shall be pro rata based upon the Effective Date) based upon certain criteria to be mutually agreed upon by the 

  

 
Executive and the Board of Directors including revenue and profitability targets and other organizational milestones. One-half of the Bonus shall be based
upon annual criteria and shall be paid after the end of each fiscal year, and the other one-half of the Bonus shall be based upon quarterly criteria and shall be paid after the end of each fiscal quarter. On or before 90 days from the Effective
Date, the Executive shall prepare and submit for the Board of Directors’ approval, a management bonus program that will include the terms and conditions of the Executive’s Bonus opportunity. The Bonus payable hereunder shall be payable
yearly in accordance with the Company’s normal practices and policies. 
  
 6. Stock Options. 
  
 (a) Initial Option. Effective as of the Effective Date, the Company shall grant the Executive an option (the “Initial Option”) to purchase 2,219,274 shares of the Company’s common stock
(the “Initial Option Shares”), which equals seven per cent of the Company’s fully-diluted capitalization as of the date hereof, at an exercise price equal to the fair market value of the Company’s common stock on the date
that the Initial Option is granted. One-fourth (1/4) of the Initial Option Shares shall vest and become exercisable on the one-year anniversary of the Effective Date. One-forty-eighth (1/48) of the Initial Option Shares shall vest and become
exercisable on the first day of each month after the one-year anniversary of the Effective Date. The Executive may exercise the Initial Option (and any additional option grant, if any), to the extent vested, for twelve months after his termination
as an employee of the Company; provided, however, that if the Executive is terminated for Cause (as defined in Section 10(c)(i) below), then the Executive may exercise the Initial Option (and any additional option grant, if any), to
the extent vested, for 90 days after his termination as an employee of the Company. In no event may the Executive exercise his Initial Option (and any additional option grant, if any) later than ten-year term/expiration date of the Initial Option.

  
 (b) Acceleration of Option Upon Change of
Control. 
  
 (i) Upon a Change of Control (as
defined below), one-fourth (1/4) of the Initial Option Shares shall vest and become exercisable on the effective date of the Change of Control; provided, however, that the foregoing clause shall not result in more than 100% of the Initial
Option Shares becoming vested. Thereafter (but subject to Section 6(c)(ii)), one-forty-eighth (1/48) of the Initial Option Shares shall vest and become exercisable and the beginning of each full month after the effective date of the Change of
Control. 
  
 (ii) If within six months after any
Change in Control, either (1) the Executive’s employment is terminated by the Company or a successor to the Company without Cause (as defined in Section 10 below and which does not include termination following the Executive’s death
or Disability) or (2) a Constructive Termination (as defined in Section 10 below) of the Executive is deemed to have occurred, then 100% of the Initial Option Shares will become fully vested and exercisable on the date of termination.

  
 (iii) The acceleration of vesting set forth
in Sections 6(b)(i) and 6(b)(ii) shall apply similarly to any additional option grant, if any, granted to the Executive. 
  
 (iv) For purposes of this Agreement, “Change of Control” shall mean the occurrence of any of the following events: (1)
the sale, lease or other disposition of all or substantially all of the assets of the Company or (2) an acquisition of the Company by another corporation or entity by 

  

 -2- 

 
consolidation, merger or other reorganization in which the holders of the Company’s outstanding voting stock immediately prior to such transaction own,
immediately after such transaction, securities representing less than fifty percent (50%) of the voting power of the corporation or other entity surviving such transaction, excluding any consolidation or merger effected exclusively to change the
domicile of the Company. 
  
 (c) Other
Provisions. The Initial Option and each Additional Option, if any, shall be granted under the Company’s 1998 Stock Option Plan (the “Stock Plan”), and except as expressly provided otherwise in this Section 6, the
Initial Option shall be subject to the terms and conditions of the Stock Plan and form of option agreement; provided, however, that the Company’s Board of Directors may, in its discretion, grant the Initial Option and/or the Additional
Option, if any, outside of the Stock Plan, and any such Options shall include such other terms as the Board of Directors may specify that are not inconsistent with the terms hereof. 
  
 7. Expenses. The Executive shall be entitled to prompt reimbursement by the Company for all reasonable ordinary and
necessary travel, entertainment, and other expenses incurred by the Executive during the Employment Period (in accordance with the policies and procedures established by the Company for its senior executive officers) in the performance of his duties
and responsibilities under this Agreement; provided, that the Executive shall properly account for such expenses in accordance with Company policies and procedures. 
  
 8. Other Benefits. During the Employment Period, the Executive shall be entitled to participate in employee benefit
plans or programs of the Company, if any, to the extent that his position, tenure, salary, age, health and other qualifications make him eligible to participate, subject to the rules and regulations applicable thereto. 
  
 9. Other Activities. The Executive shall devote substantially all of
his working time and efforts during the Company’s normal business hours to the business and affairs of the Company and its subsidiaries and to the diligent and faithful performance of the duties and responsibilities duly assigned to him
pursuant to this Agreement, except for vacations, holidays and sickness. The Executive shall not engage in any other employment, occupation, consulting or other business activity directly related to the business in which the Company is now involved
or becomes involved during the Employment Period, nor will the Executive engage in any other activities that conflict with his obligations to the Company. However, the Executive may devote a reasonable amount of his time to civic, community, or
charitable activities and, with the prior written approval of the Board of Directors, to serve as a director of other corporations and to other types of business or public activities not expressly mentioned in this section. 
  
 10. Termination of Employment and Severance Benefits. 
  
 (a) Termination of Employment. This Agreement may be
terminated at any time, without notice, upon the occurrence of any of the following events: 
  
 (i) the Company’s determination that it is terminating the Executive for Cause (as defined in Section 10(c)(i) below)
(“Termination for Cause”); 
  

 -3- 

 (ii) the Company’s determination that it is terminating the Executive without Cause,
which determination may be made by the Company at any time at the Company’s sole discretion, for any or no reason (“Termination Without Cause”); 
  
 (iii) the effective date of a written notice sent to the Company from the Executive stating that the
Executive is electing to terminate his employment with the Company (“Voluntary Termination”); 
  
 (iv) a change in the Executive’s status such that a Constructive Termination (as defined in Section 10(c)(ii) below) has
occurred; or 
  
 (v) following the
Executive’s death or Disability (as defined in Section 10(c)(iii) below). 
  
 (b) Severance Benefits. The Executive shall be entitled to receive severance benefits upon termination of employment only as set
forth in this Section 10(b): 
  
 (i)
Voluntary Termination. If the Executive’s employment terminates by Voluntary Termination under Section 10(a)(iii), then the Executive shall not be entitled to receive payment of any severance benefits. The Executive will receive
payment for all salary and unpaid vacation accrued as of the date of the Executive’s termination of employment, and the Executive’s benefits will be continued only under the Company’s then existing benefit plans and policies in
accordance with such plans and policies in effect on the date of termination and in accordance with applicable law. 
  
 (ii) Involuntary Termination. 
  
 (1) If the Executive’s employment is terminated under Section 10(a)(ii) (Termination Without Cause) or Section
10(a)(iv) (Constructive Termination) (collectively referred to herein as “Involuntary Termination”), the Executive will be entitled to receive payment of severance benefits equal to the Executive’s regular monthly salary
for the Severance Period (which is defined below). Such payments shall be made ratably over the Severance Period according to the Company’s standard payroll schedule. Health insurance benefits with the same coverage provided to the Executive
prior to the termination (e.g. medical, dental, optical, mental health) and in all other respects significantly comparable to those in place immediately prior to the termination will be provided at the Company’s cost over the Severance Period.

  
 (2) The “Severance Period”
shall mean the following: (A) the twelve-month period following the date of an Involuntary Termination, if such Involuntary Termination occurs within six months after a Change in Control, or (B) the six-month period following the date of an
Involuntary Termination, if such Involuntary Termination occurs at any point in time other than that set forth in clause (A) of this sentence. In the case of clause (A) of the previous sentence, the Severance Period shall cease (earlier than twelve
months after the date Involuntary Termination) on the date on which the Executive finds full-time employment, part-time employment, or some combination thereof pursuant to which the Executive works or is paid for an equivalent of at least 30 hours
per week; provided, however, that in no event shall the Severance Period be less than six months. 
  

 -4- 

 (iii) Termination for Cause. If the Executive’s employment is terminated for
Cause under Section 10(a)(i), then the Executive shall not be entitled to receive payment of any severance benefits. The Executive will receive payment for all salary and unpaid vacation accrued as of the date of the Executive’s
termination of employment, and the Executive’s benefits will be continued only under the Company’s then existing benefit plans and policies in accordance with such plans and policies in effect on the date of termination and in accordance
with applicable law. 
  
 (iv) Termination by
Reason of Death or Disability. In the event that the Executive’s employment with the Company terminates as a result of the Executive’s death or Disability under Section 10(a)(v), the Executive or the Executive’s estate or
representative will receive all salary and unpaid vacation accrued as of the date of the Executive’s death or Disability and any other benefits payable under the Company’s then existing benefit plans and policies in accordance with such
plans and policies in effect on the date of death or Disability and in accordance with applicable law. In addition, the Executive’s estate or representative will receive the amount of any bonus to which the Executive would have been entitled
for the fiscal year in which the death or Disability occurs to the extent that the bonus has been earned as of the date of the Executive’s death or Disability, as determined by the Board of Directors based on the specific corporate and
individual performance targets established for such fiscal year. 
  
 (c) Definitions. 
  
 (i) Cause. For purposes of this Agreement, “Cause” for the Executive’s termination will exist at any time after the happening of one or more of the following events: (1) conviction of any
felony or any crime involving moral turpitude or dishonesty; (2) participation in a fraud or act of dishonesty against the Company; (3) conduct that, based upon a good faith and reasonable factual investigation and determination by the Board,
demonstrates gross unfitness to serve; or (4) intentional, material violation of any contract between the Company and the Executive or any statutory duty of the Executive to the Company that is not corrected within thirty (30) days after written
notice thereof. Physical or mental disability shall not constitute “Cause.” 
  
 (ii) Constructive Termination. For purposes of this Agreement, “Constructive Termination” shall be deemed to occur
if the Executive elects to terminate his employment voluntarily within the 60-day period immediately following the occurrence of one or more of the following events: (1) a material adverse change in the Executive’s title or responsibilities
causing such position or responsibilities to be of materially reduced stature or responsibility; (2) a reduction of the Executive’s Base Salary; or (3) the relocation of the Executive to a facility or location more than 50 miles from the
Company’s current location, without the Executive’s express written consent. Clause (1) of the foregoing definition of Constructive Termination shall not include any or all of the following that occur after a Change of Control: (A)
the removal of the Executive from the Board of Directors; (B) the failure of the Executive to be named to the board of directors of a successor company; or (C) a change in position and/or responsibilities from Chief Executive Officer to general
manager (or other similar title), as long as such new position is a direct report to the chief executive officer or president of the successor company and as long as such new responsibilities include being directly responsible for the product
management, marketing and engineering organizations relating to the specific business and product of the Company. 
  

 -5- 

 (iii) Disability. For purposes of this Agreement, “Disability”
shall mean that the Executive, at the time notice is given, is unable to perform the essential duties hereunder with or without reasonable accommodation as the result of his incapacity due to physical or mental illness, and such inability continues
for at least 60 consecutive calendar days or 90 calendar days during any consecutive twelve-month period, if shorter, after its commencement. 
  
 11. Proprietary Information. During the Employment Period and thereafter, the Executive shall not, without the prior written consent of the Board
of Directors, disclose or use for any purpose (except in the course of his employment under this Agreement and in furtherance of the business of the Company or any of its affiliates or subsidiaries) any confidential information or proprietary data
of the Company. As an express condition of the Executive’s employment with the Company, the Executive agrees to execute the Company’s Invention Assignment and Proprietary Information Agreement in substantially the form attached hereto as
Exhibit A (the “Confidentiality Agreement”), which requires, among other provisions, the assignment of patent rights to any invention made during the Executive’s employment at the Company, and which prohibits the
disclosure of proprietary information. Similarly, the Executive agrees not to bring any third party confidential information to the Company, including that of the Executive’s former employers, and that in performing his duties for the Company,
the Executive will not in any way utilize any such information. 
  
 12. Company Handbook. The Executive agrees to sign an acknowledgment that the Executive has read and understands the Company’s rules of conduct, which are included in the Company Handbook. 
  
 13. Disclosure of Agreements. The Executive shall disclose to the
Company any and all agreements relating to his prior employments that may affect his eligibility to be employed by the Company or limit the manner in which the Executive may be employed. It is the Company’s understanding that any such
agreements will not prevent the Executive from performing the duties of his position, and the Executive represents that such is the case. 
  
 14. Non-Solicit. The Executive covenants and agrees with the Company that during his employment with the Company and for a period expiring one year
after the date of termination of such employment, he will not solicit any of the Company’s then-current employees to terminate their employment with the Company or to become employed by any firm, company or other business enterprise with which
the Executive may then be connected. 
  
 15. Compliance with
Immigration Law. For purposes of federal immigration law, the Executive will be required to provide to the Company documentary evidence of the Executive’s identity and eligibility for employment in the United States. Such documentation must
be provided to the Company within three business days of the Executive’s date of hire, or this Agreement may be terminated without triggering any severance benefits pursuant to Section 10(b)(ii). 
  
 16. Right to Advice of Counsel. The Executive acknowledges that he has
consulted with counsel and is fully aware of his rights and obligations under this Agreement. 
  
 17. Arbitration. Any dispute or controversy arising under or in connection with this Agreement shall be settled exclusively by arbitration in San Francisco, California, in accordance with the rules of the
American Arbitration Association then in effect by an arbitrator selected by both parties 

  

 -6- 

 
within ten days after either party has notified the other in writing that it desires a dispute between them to be settled by arbitration. In the event the
parties cannot agree on such arbitrator within such ten-day period, each party shall select an arbitrator and inform the other party in writing of such arbitrator’s name and address within fifteen days after the end of such ten-day period, and
the two arbitrators so selected shall select a third arbitrator within ten days thereafter; provided, however, that in the event of a failure by either party to select an arbitrator and notify the other party of such selection within the time
period provided above, the arbitrator selected by the other party shall be the sole arbitrator of the dispute. Each party shall pay its own expenses associated with such arbitration, including the expense of any arbitrator selected by such party and
the Company will pay the expenses of the jointly selected arbitrator. The decision of the arbitrator or a majority of the panel of arbitrators shall be binding upon the parties and judgment in accordance with that decision may be entered in any
court having jurisdiction. Punitive damages shall not be awarded. 
  
 18. Absence of Conflict. The Executive represents and warrants that his employment by the Company as described herein shall not conflict with and will not be constrained by any prior employment or consulting agreement or
relationship. 
  
 19. Assignment. This Agreement and all
rights under this Agreement shall be binding upon and inure to the benefit of and be enforceable by the parties hereto and their respective personal or legal representatives, executors, administrators, heirs, distributees, devisees, legatees,
successors and assigns (including successors to the Company by virtue of a Change in Control). This Agreement is personal in nature, and neither of the parties to this Agreement shall, without the written consent of the other, assign or transfer
this Agreement or any right or obligation under this Agreement to any other person or entity; except that the Company may assign this Agreement to any of its affiliates or wholly-owned subsidiaries, provided, however, that such assignment
will not relieve the Company of its obligations hereunder. If the Executive should die while any amounts are still payable to the Executive hereunder, all such amounts, unless otherwise provided herein, shall be paid in accordance with the terms of
this Agreement to the Executive’s devisee, legatee, or other designee or, if there be no such designee, to the Executive’s estate. 
  
 20. Notices. For purposes of this Agreement, notices and other communications provided for in this Agreement shall be in writing and shall be
delivered personally or sent by United States certified mail, return receipt requested, postage prepaid, addressed as follows: 
  

			
	 If to the Executive:
	    	 Mr. Enrique Salem
 409 Dalewood Dr.
 Orinda, CA 94563

		
	 If to the Company:
	    	 Brightmail, Inc.
 301 Howard St., 18th Floor
 San Francisco, CA 94105
 Attn: Chief Financial Officer

  
 or to such other address or the
attention of such other person as the recipient party has previously furnished to the other party in writing in accordance with this section. Such notices or other communications shall be effective upon delivery or, if earlier, three days after they
have been mailed as provided above. 
  

 -7- 

 21. Integration. This Agreement, the Confidentiality Agreement and the attached offer letter
(which offer letter includes the last date by which the Executive must sign and deliver this Agreement) represent the entire agreement and understanding between the parties as to the subject matter hereof and supersede all prior or contemporaneous
agreements whether written or oral (except with respect to the Executive’s stock options, which are governed by the Stock Plan and the Executive’s stock option agreement, except as expressly provided herein). No waiver, alteration, or
modification of any of the provisions of this Agreement shall be binding unless in writing and signed by duly authorized representatives of the parties hereto. 
  

22. Waiver. Failure or delay on the part of either party hereto to enforce any right, power, or privilege hereunder shall not be deemed to
constitute a waiver thereof. Additionally, a waiver by either party or a breach of any promise hereof by the other party shall not operate as or be construed to constitute a waiver of any subsequent waiver by such other party. 
  
 23. Severability. Whenever possible, each provision of this Agreement
will be interpreted in such manner as to be effective and valid under applicable law, but if any provision of this Agreement is held to be invalid, illegal or unenforceable in any respect under any applicable law or rule in any jurisdiction, such
invalidity, illegality or unenforceability will not affect any other provision or any other jurisdiction, but this Agreement will be reformed, construed and enforced in such jurisdiction as if such invalid, illegal or unenforceable provision had
never been contained herein. 
  
 24. Headings. The headings
of the sections contained in this Agreement are for reference purposes only and shall not in any way affect the meaning or interpretation of any provision of this Agreement. 
  
 25. Applicable Law. This Agreement shall be governed by and construed in accordance with the internal substantive
laws, and not the choice of law rules, of the State of California. 
  
 26. Counterparts. This Agreement may be executed in one or more counterparts, none of which need contain the signature of more than one party hereto, and each of which shall be deemed to be an original, and all of which together
shall constitute a single agreement. 
  
 [remainder of the page
intentionally left blank] 
  

 -8- 

 IN WITNESS WHEREOF, each of the parties has executed this Agreement, in the case of the Company by its
duly authorized officer, as of the day and year first above written. 
  

			
	BRIGHTMAIL, INC.:
		
	By:	 	 /s/ Eric Spivey

	 	 	

	 Title:
	 	 Chairman of the Board of Directors

  

	
	EXECUTIVE:
	
	 /s/ Enrique Salem

	

	 Enrique Salem

  

 -9- 

 Exhibit A 
  
 Invention Assignment and Proprietary Information Agreement

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