UNITED STATES
                      SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C.  20549

                                 SCHEDULE 13G
                   Under the Securities Exchange Act of 1934

                              E-STAMP CORPORATION
                               (Name of Issuer)

                   Common Stock, Par Value, $0.001 Per Share
                        (Title of Class of Securities)

                                   269154100
                                (CUSIP Number)

                               February 14, 2000
            (Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this schedule
is filed:

     [ ]  Rule 13d-1(b)
     [X]  Rule 13d-1(c)
     [ ]  Rule 13d-1(d)


*The remainder of this cover page shall be filled out for a reporting  person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter
disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).


===============================================================================


  CUSIP NO. 269154100
            ---------


- ------------------------------------------------------------------------------
      NAME OF REPORTING PERSON
 1
          Microsoft Corporation


      S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

          91-1144442
- ------------------------------------------------------------------------------
      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)
 2                                                              (a) [_]
                                                                (b) [_]

- ------------------------------------------------------------------------------
      SEC USE ONLY
 3


- ------------------------------------------------------------------------------
      CITIZENSHIP OR PLACE OF ORGANIZATION
 4
          State of Washington

- ------------------------------------------------------------------------------
                          SOLE VOTING POWER
                     5
     NUMBER OF            2,026,225

      SHARES       -----------------------------------------------------------
                          SHARED VOTING POWER
   BENEFICIALLY      6
                           -0-
     OWNED BY
                   -----------------------------------------------------------
       EACH               SOLE DISPOSITIVE POWER
                     7
    REPORTING             2,026,225

      PERSON       -----------------------------------------------------------
                          SHARED DISPOSITIVE POWER
       WITH          8
                          -0-
- ------------------------------------------------------------------------------
      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 9
            2,026,225
- ------------------------------------------------------------------------------
      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
10    (SEE INSTRUCTIONS)
                                                                    [_]

- ------------------------------------------------------------------------------
      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
11
           5.2%

- ------------------------------------------------------------------------------
      TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
12
            CO


Item 1.

     (a)  Name of Issuer:   E-Stamp Corporation (the "Issuer").

     (b)  Address of principal executive offices of the Issuer: 850 Saginaw
          Drive, 2nd Floor, Redwood City, California, 94061.

Item 2.

     (a)  Name of Person Filing:  Microsoft Corporation.

     (b)  Address of Principal Business Office:  One Microsoft Way, Redmond,
          Washington, 98052-6399.

     (c)  Citizenship:  State of Washington.

     (d)  Title of Class of Securities: Common Stock, Par Value, $0.001 Per
          Share.

     (e)  CUSIP Number: 269154100.


Item 3.   Not Applicable.

Item 4.   Ownership.

     (a)  Amount beneficially owned: 2,026,225.

     (b)  Percent of class: 5.2%.

     (c)  Number of shares as to which the person has:
          (i)   Sole power to vote or to direct the vote 2,026,225.

          (ii)  Shared power to vote or to direct the vote -0-.

          (iii) Sole power to dispose or to direct the disposition of
                2,026,225.

          (iv)  Shared power to dispose or to direct the disposition of -0-.


Item 5.  Ownership of Five Percent or Less of a Class:  Not applicable.


Item 6.  Ownership of More than Five Percent on Behalf of Another Person:  Not
         Applicable.


Item 7.  Identification and Classification of the Subsidiary Which Acquired the
         Security Being Reported on By the Parent Holding Company: Not
         Applicable.


Item 8.  Identification and Classification of Members of the Group:  Not
         Applicable.


Item 9.  Notice of Dissolution of a Group:  Not Applicable.


Item 10.  Certification:

          By signing below I certify that, to the best of my knowledge and
          belief, the securities referred to above were not acquired and are not
          held for the purpose of or with the effect of changing or influencing
          the control of the issuer of the securities and were not acquired and
          are not held in connection with or as a participant in any transaction
          having that purpose or effect.


                                   SIGNATURE

     After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this statement is true, complete and
correct.

                                   April  17, 2000
                                   ----------------
                                         Date

                                   MICROSOFT CORPORATION

                                   By  /s/ Robert A. Eshelman
                                     ----------------------
                                   Robert A. Eshelman
                                   Deputy General Counsel, Finance & Operations