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                                                                     EXHIBIT 4.1



                                  EGROUPS, INC.
                             A DELAWARE CORPORATION

NUMBER <<CERTNUMBER>>                                    *<<NOOFSHARES>>* SHARES
                                                                COMMON STOCK


        This certifies that <<NAME>> is the record holder of <<NOOFSHARES>>
shares of COMMON STOCK of EGROUPS INC. transferable only on the books of said
corporation by the holder, in person, or by duly authorized attorney, upon
surrender of this certificate properly endorsed or assigned.

        This certificate and the shares represented hereby are issued and shall
be held subject to all of the provisions of the Certificate of Incorporation and
the Bylaws of the corporation and any amendments thereto, a copy of which is on
file at the officer of the corporation and made part hereof as fully as though
the provisions of the Certificate of Incorporation and Bylaws were imprinted in
full on this certificate, to all of which the holder of this certificate, by
acceptance hereof, assents.

        The corporation will furnish without charge to each stockholder who so
requests, the powers, designations, preferences and relative, participating,
optional or other special rights of each class of stock or series thereof and
the qualifications, limitations or restrictions of such preferences and/or
rights.

        WITNESS, the Seal of the corporation and the signatures of its duly
authorized officers this <<Day>> day of <<Month>>, 2000.



- -----------------------------------          -----------------------------------
Marjorie Sennett, Chief Financial            Michael Klein, President
Officer