<PAGE>   1
                                                                     EXHIBIT 4.9

                                WARRANT AGREEMENT


         WARRANT  AGREEMENT  dated as of June 12,  2000,  between  PopMail.com,
Inc., a Minnesota corporation (the "COMPANY"), and Atlantis Capital Fund, Ltd.
(hereinafter referred to as "INVESTOR").

                              W I T N E S S E T H:

         WHEREAS, Investor has participated as an Investor in connection with
the Company's offering (the "Offering") of up to $3,000,000 of the Company's
common stock, par value $0.01 per share (the "COMMON STOCK"); and

         WHEREAS, the Warrants issued pursuant to this Agreement are being
issued by the Company to Investor and/or its designees, in consideration for,
and as part of the investment by Investor in connection with the Offering;

         NOW, THEREFORE, in consideration of the premises, the agreements herein
set forth and other good and valuable consideration, the receipt and sufficiency
of which are hereby acknowledged, the parties hereto agree as follows:

         1.       Grant.

         Investor and/or its designees are hereby granted the right to purchase,
at any time from the date of issuance of the aforementioned Debentures until
5:00 P.M., Eastern Standard Time, on June 12, 2005 (the "WARRANT EXERCISE
TERM"), 100,000 shares of common stock , par value $0.01, at an exercise price
(subject to adjustment as provided in Article 7 hereof) of $1.00 per share (the
"INITIAL EXERCISE PRICE").

         2.       Warrant Certificates.

         The warrant certificates (the "WARRANT CERTIFICATES") delivered and to
be delivered pursuant to this Agreement shall be in the form set forth as
Exhibit A, attached hereto and made a part hereof, with such appropriate
insertions, omissions, substitutions and other variations as required or
permitted by this Agreement.

         3.       Exercise of Warrants.

                  3.1      Cash Exercise. The Exercise Price may be paid in
cash or by check to the order of the Company, or any combination of cash or
check, subject to adjustment as provided in Article 7 hereof. Upon surrender of
the Warrant Certificate with the annexed Form of Election to Purchase duly
executed, together with payment of the Exercise Price (as hereinafter defined)
for the Shares purchased, at the Company's executive offices currently located
at Suite 350, Corporate Drive, Irving, Texas 75038 the registered holder of a
Warrant Certificate ("HOLDER" or "HOLDERS") shall be entitled to receive a
certificate or certificates for the Shares so purchased. The purchase rights
represented by each Warrant Certificate are exercisable at the option of the
Holder hereof, in whole or in part (but not as to fractional shares of the
Common Stock). In the case of the purchase of less than all the Shares
purchasable under any Warrant Certificate, the Company shall cancel said Warrant
Certificate upon the surrender thereof and shall execute and deliver a new
Warrant Certificate of like tenor for the balance of the Shares purchasable
thereunder.

                  3.2      Cashless Exercise. At any time during the Warrant
Exercise Term, the Holder may, at its option, exchange this Warrant, in whole or
in part (a "WARRANT EXCHANGE"), into the number

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of Shares determined in accordance with this Section 3.2, by surrendering this
Warrant at the principal office of the company or at the office of its transfer
agent, accompanied by a notice stating such Holder's intent to effect such
exchange, the number of Shares to be exchanged and the date on which the Holder
requests that such Warrant Exchange occur (the "NOTICE OF EXCHANGE"). The
Warrant Exchange shall take place on the date specified in the Notice of
Exchange or, if later, the date the Notice of Exchange is received by the
Company (the "EXCHANGE DATE"). Certificates for the Shares issuable upon such
Warrant Exchange and, if applicable, a new warrant of like tenor evidencing the
balance of the Shares remaining subject to this Warrant, shall be issued as of
the Exchange Date and delivered to the Holder within seven (7) business days
following the Exchange Date. In connection with any Warrant Exchange, this
Warrant shall represent the right to subscribe for and acquire the number of
Shares (rounded to the next highest integer) equal to (i) the number of Shares
specified by the Holder in its Notice of Exchange (the "TOTAL NUMBER") less (ii)
the number of Shares equal to the quotient obtained by dividing (A) the product
of the Total Number and the then existing Exercise Price by (B) the current
market value of a share of Common Stock.

         4.       Issuance of Certificates.

         Upon the exercise of the Warrants, the issuance of certificates for the
Shares shall be made forthwith (and in any event within five business days
thereafter) without charge to the Holder thereof including, without limitation,
any tax which may be payable in respect of the issuance thereof, and such
certificates shall be issued in the name of, or in such names as may be directed
by, the Holder thereof; provided, however, that the Company shall not be
required to pay any tax which may be payable in respect of any transfer involved
in the issuance and delivery of any such certificates in a name other than that
of the Holder and the Company shall not be required to issue or deliver such
certificates unless or until the person or persons requesting the issuance
thereof shall have paid to the Company the amount of such tax or shall have
established to satisfaction of the Company that such tax has been paid.

         The Warrant Certificates and the certificates representing the Shares
shall be executed on behalf of the Company by the manual or facsimile signature
of the present or any future Chairman or Vice Chairman of the Board of
Directors, Chief Executive officer or President or Vice President of the Company
under its corporate seal reproduced thereon, attested to by the manual or
facsimile signature of the present or any future Secretary or Assistant
Secretary of the Company. Warrant Certificates shall be dated the date of
execution by the Company upon initial issuance, division, exchange, substitution
or transfer.

         The Warrant Certificates and, upon exercise of the Warrants, in part or
in whole, certificates representing the Shares shall bear a legend substantially
similar to the following:

         The securities represented by this certificate have not been registered
         under the Securities Act of 1933, as amended (the "ACT"), and may not
         be offered or sold except (i) pursuant to an effective registration
         statement under the Act, (ii) to the extent applicable, pursuant to
         Rule 144 under the Act (or any similar rule under such Act relating to
         the disposition of securities), or (iii) upon the delivery by the
         holder to the Company of an opinion of counsel, reasonably satisfactory
         to counsel to the issuer, stating that an exemption from registration
         under such Act is available.


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         5.       Price.

                  5.1      Adjusted Exercise Price. The adjusted Exercise Price
shall be the price which shall result from time to time from any and all
adjustments of the Initial Exercise Price in accordance with the provisions of
Article 7 hereof.

                  5.2      Exercise  Price.  The term  "EXERCISE  PRICE"  herein
                           shall mean the Initial Exercise Price or the adjusted
                           Exercise Price, depending upon the context.

         6.       Registration Rights.  The  Investor  shall have registration
         rights with respect to the shares issuable pursuant to this Warrant as
         provided by the Registration Rights Agreement by the Company and the
         Investors, dated of even date herewith.

                  7.       Adjustments of Exercise Price and Number of Shares.

                  7.1      Subdivision and Combination. In case the Company
shall at any time subdivide or combine the outstanding shares of Common Stock,
the Exercise Price shall forthwith be proportionately decreased in the case of
subdivision or increased in the case of combination.

                  7.2      Adjustment in Number of Shares. Upon each adjustment
of the Exercise Price pursuant to the provisions of this Article 7, the number
of Shares issuable upon the exercise of each Warrant shall be adjusted to the
nearest full Share by multiplying a number equal to the Exercise Price in effect
immediately prior to such adjustment by the number of Shares issuable upon
exercise of the Warrants immediately prior to such adjustment and dividing the
product so obtained by the adjusted Exercise Price.

                  7.3      Reclassification, Consolidation, Merger, etc. In case
of any reclassification or change of the outstanding shares of Common Stock
(other than a change in par value to no par value, or from no par value to par
value, or as a result of a subdivision or combination), or in the case of any
consolidation of the Company with, or merger of the Company into, another
corporation (other than a consolidation or merger in which the Company is the
surviving corporation and which does not result in any reclassification or
change of the outstanding shares of Common Stock, except a change as a result of
a subdivision or combination of such shares or a change in par value, as
aforesaid), or in the case of a sale or conveyance to another corporation of the
property of the Company as an entirety, the Holders shall thereafter have the
right to purchase the kind and number of shares of stock and other securities
and property receivable upon such reclassification, change, consolidation,
merger, sale or conveyance as if the Holders were the owners of the shares of
Common Stock underlying the Warrants immediately prior to any such events at a
price equal to the product of (x) the number of shares issuable upon exercise of
the Warrants and (y) the Exercise Price in effect immediately prior to the
record date for such reclassification, change, consolidation, merger, sale or
conveyance as if such Holders had exercised the Warrants.

                  7.4       No  Adjustment of Exercise  Price in Certain  Cases.
No adjustment of the Exercise Price shall be made:

                           (a)      Upon the  issuance  or sale of shares of
                  Common Stock upon the exercise of the Warrants; or

                           (b)      Upon (i) the issuance of options pursuant to
                  the Company's employee stock option plan in effect on the date
                  hereof or the issuance or sale by the Company of any shares of
                  Common Stock pursuant to the exercise of any such options, or
                  (ii) the

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                  issuance or sale by the Company of any shares of Common Stock
                  pursuant to the exercise of any options or warrants previously
                  issued and outstanding on the date hereof; or

                           (c)      Upon the issuance of shares of Common Stock
                  pursuant to contractual obligations existing on the date
                  hereof; or

                           (d)      If the amount of said adjustment shall be
                  less than 2 cents (2(cent)) per Share, provided, however, that
                  in such case any adjustment that would otherwise be required
                  then to be made shall be carried forward and shall be made at
                  the time of and together with the next subsequent adjustment
                  which, together with any adjustment so carried forward, shall
                  amount to at least 2 cents (2(cent)) per Share.

                  7.5       Dividends and Other Distributions with Respect to
Outstanding Securities. In the event that the Company shall at any time prior to
the exercise of all Warrants declare a dividend (other than a dividend
consisting solely of shares of Common Stock or a cash dividend or distribution
payable out of current or retained earnings) or otherwise distribute to its
shareholders any monies, assets, property, rights, evidences of indebtedness,
securities (other than shares of Common Stock), whether issued by the Company or
by another person or entity, or any other thing of value, the Holder or Holders
of the unexercised Warrants shall thereafter be entitled, in addition to the
shares of Common Stock or other securities receivable upon the exercise thereof,
to receive, upon the exercise of such Warrants, the same monies, property,
assets, rights, evidences of indebtedness, securities or any other thing of
value that they would have been entitled to receive at the time of such dividend
or distribution. At the time of any such dividend or distribution, the Company
shall make appropriate reserves to ensure the timely performance of the
provisions of this Subsection 7.5.

         8.       Exchange and Replacement of Warrant Certificates. Each Warrant
Certificate is exchangeable without expense, upon the surrender hereof by the
registered Holder at the principal executive office of the Company, for a new
Warrant Certificate of like tenor and date representing in the aggregate the
right to purchase the same number of Shares in such denominations as shall be
designated by the Holder thereof at the time of such surrender.

         Upon receipt by the Company of evidence reasonably satisfactory to it
of the loss, theft, destruction or mutilation of any Warrant Certificate, and,
in case of loss, theft or destruction, of indemnity or security reasonably
satisfactory to it, and reimbursement to the Company of all reasonable expenses
incidental thereto, and upon surrender and cancellation of the Warrants, if
mutilated, the Company will make and deliver a new Warrant Certificate of like
tenor, in lieu thereof.

         9.       Elimination of Fractional Interests. The Company shall not be
required to issue certificates representing fractions of shares of Common Stock
and shall not be required to issue scrip or pay cash in lieu of fractional
interests, it being the intent of the parties that all fractional interests
shall be eliminated by rounding any fraction up to the nearest whole number of
shares of Common Stock.

         10.      Reservation and Listing of Securities. The Company shall at
all times reserve and keep available out of its authorized shares of Common
Stock, solely for the purpose of issuance upon the exercise of the Warrants,
such number of shares of Common Stock as shall be issuable upon the exercise
thereof. The Company covenants and agrees that, upon exercise of the Warrants
and payment of the Exercise Price therefor, all shares of Common Stock issuable
upon such exercise shall be duly and validly issued, fully paid, nonassessable
and not subject to the preemptive rights of any shareholder. As long as the
Warrants shall be outstanding, the Company shall use its best efforts to cause
all shares of Common Stock issuable upon the exercise of the Warrants to be
listed on or quoted on the electronic bulletin board, by NASDAQ or listed on
such national securities exchanges.

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         11.      Notices to Warrant Holders. Nothing contained in this
Agreement shall be construed as conferring upon the Holder or Holders the right
to vote or to consent or to receive notice as a shareholder in respect of any
meetings of shareholders for the election of directors or any other matter, or
as having any rights whatsoever as a shareholder of the Company. If, however, at
any time prior to the expiration of the Warrants and their exercise, any of the
following events shall occur:

                  (a)      the Company shall take a record of the holders of its
         shares of Common Stock for the purpose of entitling them to receive a
         dividend or distribution payable otherwise than in cash, or a cash
         dividend or distribution payable otherwise than out of current or
         retained earnings, as indicated by the accounting treatment of such
         dividend or distribution on the books of the Company; or

                  (b)      a dissolution, liquidation or winding up of the
         Company (other than in connection with a consolidation or merger) or a
         sale of all or substantially all of its property, assets and business
         as an entirety shall be proposed;

then, in any one or more of said events, the Company shall give written notice
of such event at least fifteen (15) days prior to the date fixed as a record
date or the date of closing the transfer books for the determination of the
shareholders entitled to such dividend, distribution, convertible or
exchangeable securities or subscription rights, options or warrants, or entitled
to vote on such proposed dissolution, liquidation, winding up or sale. Such
notice shall specify such record date or the date of closing the transfer books,
as the case may be. Failure to give such notice or any defect therein shall not
affect the validity of any action taken in connection with the declaration or
payment of any such dividend or distribution, or any proposed dissolution,
liquidation, winding up or sale.

         12.      Notices.

         All notices, requests, consents and other communications hereunder
shall be in writing and shall be deemed to have been duly made when delivered,
or mailed by registered or certified mail, return receipt requested:

                  (a)      If to a registered  Holder of the  Warrants,  to the
         address of such Holder as shown on the books of the Company; or

                  (b)      If to the Company, to the address set forth in
         Section 3 of this Agreement or to such other address as the Company may
         designate by notice to the Holders.

         13.      Supplements and Amendments. The Company and the Placement
Agent may from time to time supplement or amend this Agreement without the
approval of any Holders of Warrant Certificates in order to cure any ambiguity,
to correct or supplement any provision contained herein which may be defective
or inconsistent with any provisions herein, or to make any other provisions in
regard to matters or questions arising hereunder which the Company and the
Placement Agent may deem necessary or desirable and which the Company and the
Placement Agent deem not to adversely affect the interests of the Holders of
Warrant Certificates.

         14.      Successors. All the  covenants and  provisions of this
Agreement by or for the benefit of the Company and the Holders inure to the
benefit of their respective successors and assigns hereunder.

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         15.      Termination. This Agreement shall terminate at the close of
business on June 12, 2005. Notwithstanding the foregoing, this Agreement will
terminate on any earlier date when all Warrants have been exercised and all the
Shares issuable upon exercise of the Warrants have been resold to the public;
provided, however, that the provisions of Article 6 shall survive such
termination until the close of business on June 12, 2005.

         16.      Governing Law. This Agreement and each Warrant Certificate
hereunder shall be governed by and interpreted in accordance with the laws of
the State of Delaware without regard to the principles of conflict of laws. The
parties further agree that any action between them shall be heard in Atlanta,
Georgia, and expressly consent to the jurisdiction and venue of the Superior
Court of Fulton County, Georgia, and the United States District Court for the
Northern District of Georgia, Atlanta Division for the adjudication of any civil
action asserted pursuant to this Paragraph.

         17.      Benefits of This Agreement. Nothing in this Agreement shall be
construed to give to any person or corporation other than the Company and the
Investor and any other registered holder or holders of the Warrant Certificates,
Warrants or the Shares any legal or equitable right, remedy or claim under this
Agreement; and this Agreement shall be for the sole and exclusive benefit of the
Company and the Investor and any other holder or holders of the Warrant
Certificates, Warrants or the Shares.

         18.      Counterparts.     This  Agreement  may be  executed in any
number of counterparts and each of such counterparts shall for all purposes be
deemed to be an original, and such counterparts shall together constitute but
one and the same instrument.





                  [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]




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         IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
duly executed, as of the day and year first above written.

                                             POPMAIL.COM, INC.


                                             By:
                                                --------------------------------
                                             Name:
                                                   -----------------------------
                                             Title:
                                                   -----------------------------
Attest:
         ---------------------------
Name:
      ------------------------------
Title:
      ------------------------------

                                             INVESTOR
                                             ATLANTIS CAPITAL FUND, LTD.


                                             By:
                                                --------------------------------
                                             Name:
                                                   -----------------------------
                                             Title:
                                                    ----------------------------
Attest:
         ---------------------------
Name:
         ---------------------------
Title:
      ------------------------------

                                       7

<PAGE>   8


                                    EXHIBIT A


THE WARRANTS REPRESENTED BY THIS CERTIFICATE AND THE OTHER SECURITIES ISSUABLE
UPON EXERCISE THEREOF HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933,
AS AMENDED (THE "ACT"), AND MAY NOT BE OFFERED OR SOLD EXCEPT (i) PURSUANT TO AN
EFFECTIVE REGISTRATION STATEMENT UNDER THE ACT, (ii) TO THE EXTENT APPLICABLE,
PURSUANT TO RULE 144 UNDER SUCH ACT (OR ANY SIMILAR RULE UNDER SUCH ACT RELATING
TO THE DISPOSITION OF SECURITIES), OR (iii) UPON THE DELIVERY BY THE HOLDER TO
THE COMPANY OF AN OPINION OF COUNSEL, REASONABLY SATISFACTORY TO COUNSEL FOR THE
ISSUER, STATING THAT AN EXEMPTION FROM REGISTRATION UNDER SUCH ACT IS AVAILABLE.

THE TRANSFER OR EXCHANGE OF THE WARRANTS REPRESENTED BY THIS CERTIFICATE IS
RESTRICTED IN ACCORDANCE WITH THE WARRANT AGREEMENT REFERRED TO HEREIN.

                            EXERCISABLE ON OR BEFORE
                 5:00 P.M., EASTERN STANDARD TIME, JUNE 12, 2005

No.                                                              100,000 Shares
    ------------------------
                               WARRANT CERTIFICATE

         This Warrant Certificate certifies that Atlantis Capital Fund, Ltd.,
Inc. ("INVESTOR") or registered assigns, is the registered holder of one Warrant
to purchase, at any time from June 12, 2000, until 5:00 P.M. Eastern Standard
Time on June 12, 2005 ("EXPIRATION DATE"), up to 100,000 shares of common stock,
par value $0.01 ("SHARES"), of fully-paid and non-assessable common stock, no
par value ("COMMON STOCK"), of PopMail.com, Inc., a Minnnesota corporation (the
"COMPANY"), at the Initial Exercise Price, subject to adjustment in certain
events (the "EXERCISE PRICE"), of $1.00 per Share upon surrender of this Warrant
Certificate and payment of the Exercise Price at an office or agency of the
Company, but subject to the conditions set forth herein and in the warrant
agreement dated as of June 12, 2000, between the Company and Investor (the
"WARRANT AGREEMENT"). Payment of the Exercise Price may be made in cash, or by
certified or official bank check in New York Clearing House funds payable to the
order of the Company, or any combination of cash or check.

         No Warrant may be exercised after 5:00 P.M., Eastern Standard Time, on
the Expiration Date, at which time all Warrants evidenced hereby, unless
exercised prior thereto, shall thereafter be void.

         The Warrants evidenced by this Warrant Certificate are part of a duly
authorized issue of Warrants issued pursuant to the Warrant Agreement, which
Warrant Agreement is hereby incorporated by reference in and made a part of this
instrument and is hereby referred to in a description of the rights, limitation
of rights, obligations, duties and immunities thereunder of the Company and the
holders (the words "HOLDERS" or "HOLDER" meaning the registered holders or
registered holder) of the Warrants.

         The Warrant Agreement provides that upon the occurrence of certain
events, the Exercise Price and/or number of the Company's securities issuable
thereupon may, subject to certain conditions, be adjusted. In such event, the
Company will, at the, request of the holder, issue a new Warrant Certificate
evidencing the adjustment in the Exercise Price and the number and/or type of
securities issuable upon the exercise of the Warrants; provided, however, that
the failure of the Company to issue such new Warrant

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<PAGE>   9

Certificates shall not in any way change, alter, or otherwise impair, the rights
of the holder as set forth in the Warrant Agreement.

         Upon due presentment for registration of transfer of this Warrant
Certificate at an office or agency of the Company, a new Warrant Certificate or
Warrant Certificates of like tenor and evidencing in the aggregate a like number
of Warrants shall be issued to the transferees) in exchange for this Warrant
Certificate, subject to the limitations provided herein and in the Warrant
Agreement, without any charge except for any tax, or other governmental charge
imposed in connection therewith.

         Upon the exercise of less than all of the Warrants evidenced by this
Certificate, the Company shall forthwith issue to the holder hereof a new
Warrant Certificate representing such number of unexercised Warrants.

         The Company may deem and treat the registered holder(s) hereof as the
absolute owner(s) of this Warrant Certificate (notwithstanding any notation of
ownership or other writing hereon made by anyone), for the purpose of any
exercise hereof, and of any distribution to the holder(s) hereof, and for all
other purposes, and the Company shall not be affected by any notice to the
contrary.

         All terms used in this Warrant Certificate which are defined in the
Warrant Agreement shall have the meanings assigned to them in the Warrant
Agreement.


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         IN WITNESS WHEREOF, the Company has caused this Warrant Certificate to
be duly executed under its corporate seal.

Dated:                 , 2000              POPMAIL.COM, INC.
        ---------------

                                           By:
                                              ----------------------------------
                                           Name:
                                                --------------------------------
                                           Title:
                                                 -------------------------------
Attest:
       ----------------------------
Name:
     ------------------------------
Title:
      -----------------------------




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<PAGE>   11





                         [FORM OF ELECTION TO PURCHASE]


         The undersigned hereby irrevocably elects to exercise the right,
represented by this Warrant Certificate, to purchase              Shares and
herewith tenders in payment for such Shares cash or a certified or official bank
check payable in New York Clearing House Funds to the order of
in the amount of $           , all in accordance with the terms hereof. The
undersigned requests that a certificate for such Shares be registered in the
name of                 whose address is                          , and that
such Certificate be delivered to           , whose address is

---------------------------------------------------------------.


Dated:                 , 200        Signature:
        ---------------     -                 ---------------------------------
                                             (Signature must conform in
                                             all respects to name of
                                             holder as specified on the
                                             face of the Warrant
                                             Certificate.)



------------------------------------

------------------------------------
(Insert Social Security or Other
Identifying Number of Holder)




<PAGE>   12


                              [FORM OF ASSIGNMENT]

             (To be executed by the registered holder if such holder
                  desires to transfer the Warrant Certificate.)


         FOR VALUE RECEIVED                            hereby sells, assigns
                            ---------------------------
and transfers unto

--------------------------------------------------------------------------------
                  (Please print name and address of transferee)

this Warrant Certificate, together with all right, title and interest therein,
and does hereby irrevocably constitute and appoint
                        , Attorney, to transfer the within Warrant
Certificate on the books of the within-named Company, with full power of
substitution.

Dated:                 , 200       Signature:
        ---------------     -                ---------------------------------
                                            (Signature must conform in all
                                             respects to name of holder as
                                             specified on the face of the
                                             Warrant Certificate)


-------------------------------------

-------------------------------------
(Insert Social Security or Other
Identifying Number of Assignee)