Document:

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                                                                    EXHIBIT 10.6

                              SYBARI SOFTWARE, INC.

                          EMPLOYEE STOCK PURCHASE PLAN

                        (EFFECTIVE AS OF JANUARY 6, 2005)

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                              SYBARI SOFTWARE, INC.

                          EMPLOYEE STOCK PURCHASE PLAN

TABLE OF CONTENTS

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1.  Purpose............................................................     1

2.  Definitions........................................................     1

3.  Shares Reserved for Plan...........................................     4

4.  Administration of the Plan.........................................     4

5.  Participation in the Plan..........................................     5

6.  Purchase Price.....................................................     6

7.  Method of Payment..................................................     6

8.  Employee's Election to Purchase; Grants of Options.................     6

9.  Exercise of Option.................................................     7

10. Delivery of Common Stock...........................................     7

11. Limitations on Number of Shares That May Be Purchased..............     8

12. Stockholder Rights.................................................     9

13. Rights to Purchase Shares Not Transferable.........................     9

14. Cancellation of Election to Purchase...............................     9

15. Leave of Absence or Layoff.........................................    10

16. Effect of Failure to Make Payments When Due........................    10

17. Retirement.........................................................    10

18. Death..............................................................    11

19. Termination of Employment Other Than for Retirement or Death.......    12

20. Dividends and Interest.............................................    11

21. Application of Funds...............................................    11
</TABLE>

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22. Amendment and Termination........................................     11

23. Reports..........................................................     12

24. Effective Date; Governmental Approvals or Consents...............     12

25. Notices..........................................................     12

26. Regulations and Other Approvals; Governing Law...................     12

27. Withholding of Taxes.............................................     13

28. Legend...........................................................     13

29. No Employment Rights.............................................     13

30. Severability of Provisions.......................................     13

31. Construction.....................................................     13
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                              SYBARI SOFTWARE, INC.

                          EMPLOYEE STOCK PURCHASE PLAN

1.    PURPOSE.

            The purpose of the Sybari Software, Inc. 2005 Employee Stock
Purchase Plan (the "Plan") is to encourage and enable eligible employees of
Sybari Software, Inc. (the "Company") and certain affiliated companies to
acquire proprietary interests in the Company through the ownership of Common
Stock of the Company. The Company believes that employees who participate in the
Plan will have a closer identification with the Company by virtue of their
ability as stockholders to participate in the Company's growth and earnings. It
is the intention of the Company to have the Plan qualify as an "employee stock
purchase plan" under Section 423 of the Code. Accordingly, notwithstanding
anything to the contrary contained herein, the provisions of the Plan shall be
construed so as to extend and limit participation in a manner consistent with
the requirements of that section of the Code.

            The Plan shall be conditioned upon approval by the holders of the
Company's Common Stock within 12 months before or after the date it is adopted
by the Board of Directors the Company.

2.    DEFINITIONS.

            The following words or terms have the following meanings:

      (a)   "AGENT" shall mean the agent, broker or other administrator,
including, without limitation, employees of the Employer, appointed by the
Committee pursuant to Section 4(b) hereof.

      (b)   "ANNUAL PAY" means, unless defined otherwise by the Committee on a
prospective basis in its sole discretion, the amount of money reportable on the
employee's U.S. federal wage and tax statement, excluding overtime, shift
premium, incentive or bonus awards, profit sharing distributions, allowances and
reimbursements for expenses such as relocation allowances for travel expenses,
income or gains on the exercise of Company stock options or stock appreciation
rights, contributions (other than Code Section 401(k) or Code Section 125
contributions) made on the employee's behalf by the Company or an affiliate of
the Company under any employee benefit or welfare plan now or hereafter
established and similar items, whether or not shown on the employee's U.S.
federal wage and tax statement, but including, in the case of salespersons,
sales commissions to the extent determined by the Board or the Committee.

      (c)   "BOARD OF DIRECTORS" shall mean the Board of Directors of the
Company.

      (d)   "CODE" shall mean the Internal Revenue Code of 1986, as amended.

      (e)   "COMMITTEE" shall mean the Board of Directors or any committee that
the Board of Directors appoints to administer the Plan. To the extent that no
Committee exists that has the

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authority to administer the Plan, the functions of the Committee shall be
exercised by the Board of Directors.

      (f)   "COMPANY" shall mean Sybari Software, Inc. (or any successor
corporation).

      (g)   "DESIGNATED PARENT" shall mean any Parent of the Company that is
specifically designated as eligible to participate in the Plan by the Committee
from time to time in its sole discretion.

      (h)   "DESIGNATED SUBSIDIARIES" shall mean each Subsidiary of the Company
that has not specifically been excluded from participation by the Committee from
time to time in its sole discretion. Notwithstanding the foregoing, the term
"Designated Subsidiaries" shall not include Subsidiaries located in Foreign
Jurisdictions, unless the Committee specifically designates such Subsidiary as a
Designated Subsidiary.

      (i)   "ELIGIBLE EMPLOYEE" shall mean any person (i) whose customary
employment is for more than twenty (20) hours per week for an Employer; (ii)
whose customary employment is for five (5) months or more per calendar year; and
(iii) who has completed the Eligibility Period. Notwithstanding the foregoing,
the Committee may exclude the employees of any specified Designated Parent or
Designated Subsidiary from any offering under the Plan.

      (j)   "ELIGIBILITY PERIOD" shall mean, with respect to any employee, the
ninety (90) day period commencing on the first day of each fiscal quarter of the
Company after the employee has completed six (6) continuous months of service
with the Employer. Notwithstanding the foregoing, the Committee may, in its sole
discretion, increase or decrease the length of the Eligibility Period with
respect to employees of the Company or any Designated Parent or Designated
Subsidiary; provided that such period shall in no event exceed two (2) years.

      (k)   "EMPLOYER" shall mean, with respect to any employee, the Company or
Designated Subsidiary or Designated Parent by which the employee is employed.

      (l)   "EXCHANGE ACT" shall mean the Securities Exchange Act of 1934, as
amended.

      (m)   "EXERCISE DATE" shall mean the last business day of each Purchase
Period in which payroll deductions are made under the Plan.

      (n)   "FOREIGN JURISDICTION" shall mean any jurisdiction outside of the
United States, including, without limitation, countries, states, provinces and
localities.

      (o)   "MARKET PRICE" shall mean, for purposes of the Plan, unless
otherwise required by the Code or any regulations issued thereunder, as of any
date, the last sales price reported for the Common Stock on the applicable date:
(i) as reported on the principal national securities exchange on which it is
then traded or The Nasdaq Stock Market, or (ii) if not traded on any such
national securities exchange or The Nasdaq Stock Market, as quoted on an
automated quotation system sponsored by the National Association of Securities
Dealers, Inc. If the Common Stock is not traded or quoted on a national
securities exchange, The Nasdaq Stock Market or any

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automated quotation system sponsored by the National Association of Securities
Dealers, Inc., its Market Value shall be set in good faith by the Committee.

      (p)   "OFFERING DATE" shall mean the first business day of each Purchase
Period.

      (q)   "OPTION" shall mean the right or rights granted to an Eligible
Employee to purchase the Company's Common Stock under an offering made under the
Plan, including pursuant to such Eligible Employee's elections to purchase.

      (r)   "PARENT" shall mean any parent corporation of the Company within the
meaning of Section 424(e) of the Code.

      (s)   "PARTICIPANT" shall mean an Eligible Employee who participates in
the Plan in accordance with Sections 5 and 8.

      (t)   "PLAN" shall mean the Sybari Software, Inc. 2005 Employee Stock
Purchase Plan, as amended from time to time.

      (u)   "PURCHASE PERIOD" shall mean the period beginning on the first day
of each fiscal quarter of the Company and ending on the last day of each fiscal
quarter of the Company, or such other period designated by the Committee, in its
sole discretion, during which installment payments for Common Stock purchased
under the Plan shall be made.

      (v)   "RULE 16b-3" shall mean Rule 16b-3 promulgated under Section 16(b)
of the Exchange Act as then in effect or any successor provisions.

      (w)   "SHARES" or "COMMON STOCK" shall mean shares of the Company's common
stock, par value $0.01 per share.

      (x)   "SUBSIDIARY" shall mean any subsidiary corporation of the Company
within the meaning of Section 424(f) of the Code.

      (y)   "SUBSCRIPTION PERIOD" shall mean the period from the first day of
the preceding Purchase Period through the 20th day of the last month of the
preceding Purchase Period, or such other period of time designated by the
Committee, in its sole discretion, during which Participants may elect to
purchase Shares during the immediately succeeding Purchase Period.

3.    SHARES RESERVED FOR PLAN.

      (a)   The Shares to be sold to Eligible Employees may, at the election of
the Committee, be purchased by the Agent on the open market or may be treasury
shares or newly issued and authorized Shares delivered to the Plan, upon such
terms as the Committee may approve. The maximum number of Shares that shall be
reserved and made available for sale under the Plan shall be 225,000, subject to
adjustment as provided in paragraph (b) of this Section. The Shares reserved may
be issued and sold pursuant to one or more offerings under the Plan. With
respect to each offering, the Committee may specify the number of Shares to be
made available, the length of the Subscription Period, the length of the
Purchase Period, the

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Offering Dates and such other terms and conditions not inconsistent with the
Plan as may be necessary or appropriate. In no event shall an Option be
exercisable more than twenty-seven (27) months after its Offering Date.

      (b)   In the event of any increase, reduction or change or exchange of
Common Stock for a different number or kind of Shares or other securities of the
Company by reason of a reclassification, recapitalization, merger,
consolidation, reorganization, stock dividend, stock split or reverse stock
split, combination or exchange of Shares, repurchase of Shares, change in
corporate structure or otherwise, the Committee shall conclusively determine the
appropriate equitable adjustments, if any, to be made under the Plan, including,
without limitation, adjustments to the number of Shares that have been
authorized for issuance under the Plan but have not yet been placed under
Option, as well as the price per Share covered by each Option that has not yet
been exercised.

      (c)   In the event of the complete liquidation of the Company or of a
reorganization, consolidation or merger in which the Company is not the
surviving corporation, any Option shall continue in full force and effect unless
either (i) the Committee modifies such Option so that it is fully exercisable
with respect to all of the Common Stock subject thereto prior to the effective
date of such transaction or (ii) the surviving corporation issues or assumes a
stock option as contemplated under Section 424(a) of the Code.

4.    ADMINISTRATION OF THE PLAN.

      (a)   The Plan shall be administered by the Committee and the Committee
may select an administrator or any other person to whom its duties and
responsibilities hereunder may be delegated. The Committee shall have full power
and authority, subject to the provisions of the Plan, to promulgate such rules
and regulations as it deems necessary for the proper administration of the Plan,
to interpret the provisions and supervise the administration of the Plan and to
take all actions in connection therewith or in relation thereto as it deems
necessary or advisable. The Committee may adopt special guidelines and
provisions for persons who are residing in, or subject to the laws of, Foreign
Jurisdictions to comply with applicable tax and securities laws thereof. All
interpretations and determinations of the Committee shall be made in its sole
and absolute discretion based on the Plan and shall be final, conclusive and
binding on all parties.

      (b)   The Committee may employ such legal counsel, consultants, brokers
and agents as it may deem desirable for the administration of the Plan and may
rely upon any opinion received from any such counsel or consultant and any
computation received from any such consultant, broker or agent. The Committee
may, in its sole discretion, designate an Agent to administer the Plan, purchase
and sell Shares in accordance with the Plan, keep records, send statements of
account to employees and to perform other duties relating to the Plan, as the
Committee may request from time to time. The Agent shall serve as custodian for
purposes of the Plan and, unless otherwise requested by the Participant, Common
Stock purchased under the Plan shall be held by and in the name of, or in the
name of a nominee of, the custodian for the benefit of each Participant, who
shall thereafter be a beneficial stockholder of the Company. The Committee may
adopt, amend or repeal any guidelines or requirements necessary for the custody

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and delivery of the Common Stock, including, without limitation, guidelines
regarding the imposition of reasonable fees in certain circumstances.

      (c)   The Company shall, to the fullest extent permitted by law and the
Certificate of Incorporation and By-laws of the Company, to the extent not
covered by insurance, indemnify each director, officer or employee of the
Employer (including the heirs, executors, administrators and other personal
representatives of such person) and each member of the Committee against all
expenses, costs, liabilities and losses (including attorneys' fees, judgments,
fines, excise taxes or penalties and amounts paid or to be paid in settlement)
actually and reasonably incurred by such person in connection with any
threatened, pending or actual suit, action or proceeding (whether civil,
criminal, administrative or investigative in nature or otherwise) in which such
person may be involved by reason of his service to the Plan in any capacity at
the request of the Company, except in instances where any such person engages in
willful neglect or fraud. Such right of indemnification shall include the right
to be paid by the Company for expenses incurred or reasonably anticipated to be
incurred in defending any such suit, action or proceeding in advance of its
disposition; provided, however, that the payment of expenses in advance of the
settlement or final disposition of a suit, action or proceeding shall be made
only upon delivery to the Company of an undertaking by or on behalf of such
person to repay all amounts so advanced if it is ultimately determined that such
person is not entitled to be indemnified hereunder. Such indemnification shall
be in addition to any rights of indemnification the person may have as a
director, officer or employee or under the Certificate of Incorporation of the
Company or the By-Laws of the Company. Expenses incurred by the Committee or the
Board of Directors in the engagement of any such counsel, consultant or agent
shall be paid by the Company.

5.    PARTICIPATION IN THE PLAN.

            Options to purchase Shares under the Plan shall be granted to all
Eligible Employees who elect to participate in accordance with Section 8;
provided, however, that solely to the extent allowable under Section 423 of the
Code, the Committee may determine that any offering of Shares under the Plan
will not be extended to all or some officers, highly compensated employees of
the Employer or employees whose principal duties consist of supervising the work
of other employees.

6.    PURCHASE PRICE.

            The purchase price for Shares purchased pursuant to the Plan shall
be determined by the Committee, in its sole discretion, and shall remain in
effect unless modified at least thirty (30) days prior to the applicable
Offering Date, but in no event shall be less than the lesser of: (i) eighty-five
percent (85%) of the Market Price of a Share on the Offering Date or (ii)
eighty-five percent (85%) of the Market Price of a Share on the Exercise Date.
Effective as of the effective date of the Plan until modified by the Committee,
the price per Share subject to an offering shall be the lesser of: (i)
eighty-five percent (85%) of the Market Price of a Share on Offering Date or
(ii) eighty-five (85%) of the Market Price of a Share on the Exercise Date.

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7.    METHOD OF PAYMENT.

            Payment for Shares purchased pursuant to the Plan shall be made in
installments through payroll deductions.

8.    EMPLOYEE'S ELECTION TO PURCHASE; GRANTS OF OPTIONS.

      (a)   In order to participate in the Plan, an Eligible Employee must sign
an election to purchase Shares on a form provided by the Company stating the
Eligible Employee's desire to purchase Shares under the Plan and showing the
amount that the Eligible Employee elects to have withheld from his pay for each
payroll period during the Purchase Period. The signed election to purchase
Shares must be delivered on or before the last day of the Subscription Period to
the person or office designated to receive and accept such elections. An
authorization shall remain in effect until modified or terminated by the
Participant.

      (b)   All payroll deductions made by a Participant shall be credited to
such Participant's account under the Plan. A Participant may not make any
additional payments into such account except as otherwise provided herein.

      (c)   In the event a Participant makes a hardship withdrawal of employee
deferral contributions under a 401(k) profit sharing plan of the Company, a
Subsidiary or a Parent or an affiliate or any other plan qualified under Section
401(a) of the Code that contains a Code Section 401(k) feature, to the extent
required by such plan, such Participant's payroll deductions and the purchase of
Shares under the Plan shall be suspended until the first payroll period
following the Offering Date commencing after the six (6)-month period (or such
other time period required under Section 401(k) of the Code) after such hardship
withdrawal. If a Participant who elects a hardship withdrawal under such a plan
has a cash balance accumulated in his account at the time of withdrawal that has
not already been applied to purchase Shares, such cash balance shall be returned
to the Participant as soon as administratively practicable.

9.    EXERCISE OF OPTION.

      (a)   A Participant's election to purchase Shares during a Purchase Period
shall be exercised automatically on the Exercise Date and the maximum number of
whole Shares subject to such Option shall be purchased for such Participant at
the applicable Option price with the accumulated payroll deductions in such
Participant's account. If all or any portion of the Shares cannot reasonably be
purchased on the Exercise Date because of unavailability or any other reason, in
the sole discretion of the Committee, such purchase shall be made as soon
thereafter as practicable. In no event shall certificates for any fractional
Shares be issued under the Plan.

      (b)   If the total number of Shares that would otherwise be subject to
Options granted on an Offering Date exceeds the number of Shares then available
under the Plan (after deduction of all Shares for which Options have been
exercised or are then outstanding), the Committee shall make a pro rata
reduction of the Shares remaining available for new Option grants in as uniform
a manner as practicable and as it shall determine to be equitable. In such
event, the Committee may similarly reduce the rate of payroll deductions, if
necessary.

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      (c)   All Shares included in any offering under the Plan in excess of the
total number of Shares that all Participants elect to purchase and all Shares
with respect to which elections to purchase are canceled as provided in Section
14 shall continue to be reserved for the Plan and shall be available for
inclusion in any subsequent offering under the Plan.

      (d)   During a Participant's lifetime, the Participant's Options may be
exercised only by the Participant.

10.   DELIVERY OF COMMON STOCK.

      (a)   Certificates for whole shares of Common Stock shall not be issued to
Participants unless and until requested or as otherwise provided herein. Such
certificates shall be issued as soon as administratively practicable following
the Participant's request for issuance. Cash received in lieu of fractional
Shares shall accumulate in the Participant's account during his employment. A
fee fixed by the Plan's Agent or transfer agent, as the case may be, may be
charged to the Participant for the issuance of certificates of Common Stock and
for the replacement of lost certificates. The Committee or the Plan's Agent may
establish limitations on the issuance of certificates to the extent allowable by
applicable law.

      (b)   A Participant may request the Agent to sell all or a portion of
Shares for which certificates have not been issued and receive cash for such
Shares, subject to any brokerage fees or commissions.

      (c)   Notwithstanding any other provision of the Plan to the contrary,
following a Participant's termination of employment, death or retirement from
all of the Company, any Designated Subsidiary and any Designated Parent, the
Participant (or, in the case of death, his legal representative) shall elect,
within such period as prescribed by the Committee, to (i) direct the Committee
or Agent to sell all or a portion of Shares for which certificates have not been
issued for cash, subject to any brokerage fees or commissions; (ii) receive
certificates for all of the whole Shares credited to the Participant's account
under the Plan (and any cash that has accumulated in lieu of fractional Shares);
or (iii) receive payment from the Plan for all Shares in such other manner then
permitted by the Committee in its sole discretion, including permitting the
transfer of certificates for all whole Shares credited to the Participant's
account under the Plan to an individual brokerage account established by the
Agent for the benefit of the Participant or for the benefit of the Participant
and the Participant's spouse as joint tenants with rights of survivorship. The
Committee may establish and adopt rules dictating the default election of a
Participant (or, in the case of death, his legal representative) who does not
make a timely election pursuant to this paragraph (c). A fee fixed by the Plan's
Agent may be charged to the Participant for the issuance of certificates of
Shares.

11.   LIMITATIONS ON NUMBER OF SHARES THAT MAY BE PURCHASED.

      (a)   Notwithstanding any provisions of the Plan to the contrary, no
individual shall be granted an Option under the Plan:

            (i)   if, immediately after the grant, such individual (or any other
                  person whose stock would be attributed to such individual
                  pursuant to Section 424(d) of

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                  the Code) would own stock and/or hold outstanding Options to
                  purchase stock possessing five percent (5%) or more of the
                  total combined voting power or value of all classes of stock
                  of the Company or of any Subsidiary or Parent; or

            (ii)  that permits such individual's right to purchase stock under
                  all employee stock purchase plans (as described in Section 423
                  of the Code) of the Company and any Subsidiary or Parent to
                  accrue at a rate that exceeds twenty-five thousand dollars
                  ($25,000) of the fair market value of such stock (determined
                  at the time such option is granted) for any calendar year in
                  which such option is outstanding at any time, or such other
                  limit as may apply under Section 423(b)(8) of the Code; or

            (iii) that permits an Eligible Employee to purchase Shares during
                  any one offering pursuant to the Plan for an aggregate
                  purchase price (which shall be computed on an annual basis in
                  the event the Purchase Period is more or less than twelve (12)
                  months) in excess of ten percent (10%) of his Annual Pay.

      (b)   An Eligible Employee may elect to purchase less than the number of
Shares that he is entitled to elect to purchase.

12.   STOCKHOLDER RIGHTS.

            The Shares purchased upon exercise of an Option hereunder shall be
credited to the Participant's account under the Plan and shall be deemed to be
transferred to the Participant on the Exercise Date. Only upon the issuance of
Shares to a Participant or his agent (and only in respect to such Shares
purchased) shall a Participant obtain the rights of stockholders, including,
without limitation, any right to vote the Shares or receive any dividends or any
other distributions thereon. The Shares purchased will be issued as soon as
practicable after the Exercise Date.

13.   RIGHTS TO PURCHASE SHARES NOT TRANSFERABLE.

      (a)   Neither payroll deductions credited to a Participant's account nor
any rights with regard to the exercise of an Option or to receive Shares under
the Plan may be sold, pledged, assigned or transferred in any manner otherwise
than by will or the laws of descent and distribution. Any such attempt at
assignment, transfer, pledge or other disposition shall be without effect,
except that the Company may treat such act as an election to withdraw funds in
accordance with Section 10 hereof.

      (b)   All rights of a Participant granted under the Plan, including, but
not limited to, the grant of an Option, the right to exercise an Option and the
ability to authorize payroll deductions shall relate solely to a Participant,
except as otherwise provided in Section 18 hereof.

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14.   CANCELLATION OF ELECTION TO PURCHASE.

      (a)   A Participant who has elected to purchase Shares during a Purchase
Period may cancel or reduce (a "partial cancellation") his election with respect
to such Purchase Period. Unless otherwise determined by the Committee, any such
full or partial cancellation shall be effective as soon as practicable after the
delivery by the Participant of written notice of cancellation on a form provided
by, or acceptable to, the Committee for such purpose to the office or person
designated by the Committee to receive such elections. Such notice must be so
delivered no later than the close of business on the 20th day of the month
preceding the Exercise Date.

      (b)   If a Participant partially reduces his original election by reducing
the amount authorized to be withheld from his pay, he shall continue to make
installment payments at the reduced rate for the remainder of the Purchase
Period. Only one partial cancellation may be made during a Purchase Period,
unless otherwise determined by the Committee.

      (c)   An Eligible Employee's rights upon the full cancellation of his
election to purchase Shares shall be limited to receiving in cash, as soon as
practicable after delivery of the notice of cancellation, the cash balance
(without interest) then credited to his account.

      (d)   A Participant's modification of his election pursuant to this
Section 14 shall also apply to all subsequent Purchase Periods, unless the
Participant delivers a new election form in accordance with Section 8.

15.   LEAVE OF ABSENCE OR LAYOFF.

      (a)   If a Participant is granted a leave of absence (including a military
leave) or is laid off during a Purchase Period, his election to purchase shall
be deemed to have been canceled at the time of the leave of absence or layoff. A
Participant's rights upon leave of absence (including a military leave) or
layoff shall be limited to having the cash balance credited to his account at
the time such leave of absence or layoff becomes effective applied to the
purchase of Shares on the Exercise Date.

      (b)   In the event that such individual's leave of absence ends and such
individual again becomes an Eligible Employee within 90 days from the date of
his leave of absence or layoff, payroll deductions shall resume automatically in
accordance with his most recent payroll deduction authorization form in effect
prior to the leave of absence or layoff.

16.   EFFECT OF FAILURE TO MAKE PAYMENTS WHEN DUE.

      (a)   If in any payroll period, for any reason not set forth in Section
14, a Participant who has filed an election to purchase Shares under the Plan
has no pay or his pay is insufficient (after other authorized deductions) to
permit deduction of his installment payment, the Participant may make a payment
to the Plan in cash at such time equal to the amount of the installment payment
deficiency. If such cash payment is not so made, the Participant, when his pay
is again sufficient to permit the resumption of installment payments, must make
a cash payment equal to any deficiency in his account or arrange for uniformly
increased installment

<PAGE>

payments such that, assuming the maximum purchase price per Share, payment for
the maximum number of Shares covered by his Option will be completed in the last
month of the Purchase Period. A Participant may make up any remaining deficiency
without interest by making a lump sum payment at any time prior to the Exercise
Date.

      (b)   Subject to paragraph (a) above and other provisions of the Plan
permitting postponement, the Company may treat the failure by a Participant to
make any payment as a cancellation of his election to purchase Shares. Such
cancellation will be effected by mailing notice to him at his last known
business or home address. Upon such mailing, his only right will be to receive
in cash the amount credited to his account.

17.   RETIREMENT.

      (a)   Upon "Retirement" (as hereinafter defined), a Participant's
participation will be terminated as of the date of retirement and the
Participant's only right will be to receive in cash the amount credited to his
account.

      (b)   For the purposes of the Plan, "Retirement," unless otherwise
provided by the Committee, shall mean a Participant's termination of employment
at or after age sixty-five (65) (other than by reason of death or Disability)
unless the Participant was terminated for Cause or, as of such time, could have
been terminated for Cause.

18.   DEATH.

            If a Participant dies and has an election to purchase Shares in
effect at the time of his death, the election will be deemed canceled as of the
date of death and the only right of the Participant's legal representative will
be to receive in cash the amount credited to the deceased Participant's account.

19.   TERMINATION OF EMPLOYMENT OTHER THAN FOR RETIREMENT OR DEATH.

            If a Participant's employment is terminated for any reason other
than Retirement or death prior to the end of the Purchase Period, his election
to purchase Shares shall thereupon be deemed canceled as of the date on which
his employment ended. In such an event, no further payments under such election
will be permitted and the Participant's only right will be to receive in cash
the amount credited to his account.

20.   DIVIDENDS AND INTEREST.

      (a)   Cash dividends, if any, on Shares acquired through the Plan will be
automatically paid by check directly to the Participant by the Company or, if
applicable, the transfer agent. Dividends paid in property other than cash or
Common Stock shall be distributed to Participants as soon as practicable.

      (b)   Except as required by law, including, without limitation, the
Investment Company Act of 1940, as amended, no interest shall accrue on or be
payable with respect to the payroll deductions of a Participant in the Plan.

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21.   APPLICATION OF FUNDS.

            All funds received by the Company in payment for Shares purchased
under the Plan and held by the Company at any time may be used for any corporate
purpose and need not be segregated from other corporate funds.

22.   AMENDMENT AND TERMINATION.

            The Company, by action of the Board of Directors (or its designee)
or the Committee, may at any time terminate, amend or freeze the Plan. No such
termination shall adversely affect Options previously granted and no amendment
may make any change in any Option theretofore granted that adversely affects the
rights of any Participant. No amendment shall be effective unless approved by
the stockholders of the Company if stockholder approval of such amendment is
required to comply with Section 423 of the Code or to comply with any other
applicable law, regulation or stock exchange rule. Upon termination of the Plan,
the Company shall return or distribute the payroll deductions credited to a
Participant's account that have not been used to purchase Shares and shall
distribute or credit Shares credited to a Participant's account. Upon the
freezing of the Plan, any payroll deductions credited to a Participant's account
that have not been used to purchase Shares shall be used to purchase Shares in
accordance with Section 9, with the Exercise Date in such event deemed to be the
effective date of the freezing of the Plan.

23.   REPORTS.

            Individual accounts shall be maintained for each Participant in the
Plan. Statements of account shall be given to Participants at such times
prescribed by the Committee; such statements shall set forth the amounts of
payroll deductions, the purchase price per Share, the number of Shares
purchased, the aggregate Shares in the Participant's account and the remaining
cash balance, if any.

24.   EFFECTIVE DATE; GOVERNMENTAL APPROVALS OR CONSENTS.

            The Plan and any offerings and sales to Eligible Employees under it
are subject to any governmental approvals or consents that may be or become
applicable in connection therewith. The Board of Directors or the Committee may
make such changes in the Plan and include such terms in any offering under the
Plan as may be necessary or desirable, in the opinion of counsel, so that the
Plan will comply with the rules and regulations of any governmental authority
and so that Participants will be eligible for tax benefits under the Code or the
laws of any state or Foreign Jurisdiction.

25.   NOTICES.

            All notices or other communications by a Participant to the Company
or the Committee under or in connection with the Plan shall be deemed to have
been duly given when received in the form specified by the Company or Committee
at the location, or by the person, designated for the receipt thereof and within
the time period prescribed by the Company or Committee. Each Participant shall
be responsible for furnishing the Committee with the current

<PAGE>

and proper address for the mailing of notices and the delivery of other
information. Any notices or communications by the Company to a Participant shall
be deemed given if directed to such address and mailed by regular United States
mail, first-class and prepaid. If any item mailed to such address is returned as
undeliverable to the addressee, mailing shall be suspended until the Participant
furnishes the proper address.

26.   REGULATIONS AND OTHER APPROVALS; GOVERNING LAW.

      (a)   This Plan and the rights of all persons claiming hereunder shall be
construed and determined in accordance with the laws of the State of Delaware
without giving effect to the choice of law principles thereof, except to the
extent that such law is preempted by federal law.

      (b)   The obligation of the Company to sell or deliver Shares with respect
to Options granted under the Plan shall be subject to all applicable laws, rules
and regulations, including all applicable federal and state securities laws, and
the obtaining of all such approvals by governmental agencies as may be deemed
necessary or appropriate by the Committee.

      (c)   To the extent required, the Plan is intended to comply with Rule
16b-3 and the Committee shall interpret and administer the provisions of the
Plan in a manner consistent therewith. Any provisions inconsistent with Rule
16b-3 shall be inoperative and shall not affect the validity of the Plan. The
Committee may establish and adopt administrative guidelines, designed to
facilitate compliance with Section 16(b) of the Exchange Act and Rule 16b-3, as
it may deem necessary or proper for the administration and operation of the Plan
and the transaction of business thereunder.

27.   WITHHOLDING OF TAXES.

      (a)   If the Participant makes a disposition, within the meaning of
Section 424(c) of the Code and the regulations promulgated thereunder, of any
Share or Shares issued to such Participant pursuant to such Participant's
exercise of an Option and such disposition occurs within the two-year period
commencing on the day after the Offering Date or within the one-year period
commencing on the day after the Exercise Date, such Participant shall
immediately, or as soon as practicable thereafter, notify the Company thereof
and deliver to the Company any amount of federal, state or local income taxes
and other amounts that the Company determines it is required to withhold.

      (b)   Notwithstanding anything herein to the contrary, the Employer shall
have the right to make such provisions as it deems necessary to satisfy any
obligations to withhold federal, state or local income taxes or other taxes
incurred by reason of the issuance of Shares pursuant to the Plan.
Notwithstanding anything herein to the contrary, the Employer may require a
Participant to remit an amount equal to the required withholding amount and may
invalidate any election if the Participant does not remit applicable withholding
taxes. Without limiting the generality of the foregoing, any withholding
obligation with regard to any Participant may be satisfied by: (i) reducing the
number of Shares otherwise deliverable to the Participant; (ii) subject to the
Committee's prior consent, any method approved by the Committee; or (iii) by the
Participant's payment of cash to the Company.

<PAGE>

28.   LEGEND.

      (a)   The Committee may require each person receiving shares pursuant to
the exercise of an Option to represent to and agree with the Company in writing
that the Participant is acquiring the shares without a view to distribution
thereof. In addition to any legend required by the Plan, the certificates for
such Shares may include any legend that the Committee deems appropriate to
reflect any restrictions on transfer.

      (b)   All certificates for Shares delivered under the Plan shall be
subject to such stock transfer orders and other restrictions as the Committee
may deem advisable to assist in the compliance with any applicable tax
withholding laws or under the rules, regulations and other requirements of the
Securities and Exchange Commission, any stock exchange upon which the Common
Stock is then listed or any national securities association system upon whose
system the Common Stock is then quoted, any applicable Federal or state
securities law and any applicable corporate law, and the Committee may cause a
legend or legends to be put on any such certificates to make appropriate
reference to such restrictions.

29.   NO EMPLOYMENT RIGHTS.

            The establishment and operation of the Plan shall not confer any
legal rights upon any Participant or other person for a continuation of
employment, nor shall it interfere with the rights of an Employer to discharge
any employee and to treat him without regard to the effect which that treatment
might have upon him as a Participant or potential Participant.

30.   SEVERABILITY OF PROVISIONS.

            If any provision of the Plan shall be held invalid or unenforceable,
such invalidity or unenforceability shall not affect any other provisions hereof
and the Plan shall be construed and enforced as if such provisions had not been
included.

31.   CONSTRUCTION.

            The use of a masculine pronoun shall include the feminine and the
singular form shall include the plural form, unless the context clearly
indicates otherwise. The headings and captions herein are provided for reference
and convenience only, shall not be considered part of the Plan, and shall not be
employed in the construction of the Plan.<PAGE>
                                                                  EXHIBIT 10.7.5

      This is a rider between Woodcotton management INC. (landlord) and Sybari
software INC. (tenant) attached to the original lease.

      (1) January 1st 2005 to December 31st 2005 rent will be $7,967.45 each
      month.

      (2) January 1st 2006 to June 30th 2006 rent will be $8445.50 each month.
      (6% increase)

      (3) Total proportion share for the purpose of this lease is deemed to be
      78%

Woodcotton Management INC.                  Sybari software INC.

/s/ PETER TU   12/1/04                      /s/ ROBERT WALLACE     12/3/04
------------                                ---------------------

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