Document:

<PAGE>

                                                                   EXHIBIT 10.47

               MANIFEST SYSTEM SERVICES AND CO-BRANDING AGREEMENT
               --------------------------------------------------

     This Manifest System Services and Co-Branding Agreement ("Agreement") is
                                                               ---------
made and entered into as of April 27, 1999 (the "Effective Date"), by and
                                                 --------------
between iShip.com, Inc., a Washington corporation (the "Company"), and Mail
                                                        -------
Boxes Etc. USA, Inc., a California corporation ("MBE").
                                                 ---

                                    RECITALS
                                    --------

     A.  The Company has developed an Internet-based shipping system.

     B.  MBE wishes to have the Company provide an Internet-based service based
on the Company's Internet-based shipping system and the MBE retail manifest
system to the MBE Centers (as defined below) for use in manifesting and shipping
customer packages, all subject to the terms and conditions set forth in this
Agreement.

     C.  The Company and MBE desire to engage in certain co-branding activities
on the Internet so as to allow customers of MBE Centers to use the Company's
Internet-based shipping system in a convenient manner and to list the MBE
Centers as drop-off locations and retail shipping centers.

     D.  In connection with the services to be provided hereunder, the Company
desires to issue to MBE a warrant to purchase up to One million three hundred
thirty three thousand three hundred thirty three (1,333,333) shares (as
determined pursuant to the terms of the Warrant) of Series B Preferred Stock of
the Company substantially in the form attached hereto as Exhibit A (the
                                                         ---------
"Warrant").
 -------
                                    AGREEMENT
                                    ---------

1.   Definitions.
     -----------

     The following terms are defined for the purposes of this Agreement as
follows:

     (a) "Acceptance" shall mean MBE's acknowledgment pursuant to Section 2
          ----------
below that (i) access to the Service has been granted, and (ii) the Service
functions in accordance with the Specifications.

     (b) "Authorized Equipment" shall mean the particular type of computer
          --------------------
equipment and the specifications thereof set forth in Exhibit B attached hereto
                                                      ---------
on which the Service is intended to be accessed and used by the MBE Centers.

     (c) "Brand Features" means each party's respective trademarks, trade names,
          --------------
service marks, service names and distinct brand elements that appear from time
to time in each party's properties, ventures and services worldwide and are
protected under U.S. copyright law or as to which each party has established
trademarks or trade dress rights and any modifications to the foregoing that may
be created during the term of this Agreement.
<PAGE>

     (d) "Brand Guidelines" means the guidelines, if any, for use of the Brand
          ----------------
Features, which may be prescribed by each party from time to time during the
term of this Agreement.

     (e) "Bounty Customer" shall mean any Company Internet Customer or Third
          ---------------
Party/Company Customer.

     (f) "Company Internet Customer" shall have the meaning set forth on Exhibit
          -------------------------                                      -------
C attached hereto.
-

     (g) "Company Site" shall mean the web site or sites of the Company on the
          ------------
Internet, one of which is currently located at www.iship.com.
                                               -------------

     (h) "Company Technology" shall mean the Internet-based manifest system of
          ------------------
the Company that allows users to, among other things, compare various shipping
services, print shipping labels and/or track shipments using the Internet.

     (i) "Confidential Information" shall mean the Service Documentation, the
          ------------------------
Specifications and any information disclosed by one party to the other pursuant
to this Agreement that is in written, graphic, machine readable or other
tangible form and is marked "Confidential," "Proprietary" or in some other
manner to indicate its confidential nature, including but not limited to
information related to the respective parties' business, products, proposed new
products, customers or related information. Confidential Information may also
include oral information disclosed by one party to the other pursuant to this
Agreement, provided that such information is designated as confidential at the
time of disclosure and is reduced to writing by the disclosing party within a
reasonable time (not to exceed thirty (30) days) after its oral disclosure, and
such writing is marked in a manner to indicate its confidential nature and
delivered to the receiving party.

     (j) "eBay Customer" shall have the meaning set forth on Exhibit C.
          -------------                                      ---------

     (k) "In-Center Customer" shall have the meaning set forth on Exhibit C.
          ------------------                                      ---------

     (l) "Intellectual Property Rights" means all rights in and to trade
          ----------------------------
secrets, patents, copyrights, trademarks, know-how, as well as moral rights and
similar rights of any type under the laws of any governmental authority,
domestic or foreign, including rights in and to all applications and
registrations relating to any of the foregoing.

     (m) "Link" means a URL hidden behind a formatting option that may take the
          ----
form of a colored item of text (such as a URL description), logo or image, and
which allows a user to automatically move to or between web pages or web sites.

     (n) "Listings" shall mean the listing of the names, addresses, pricing and
          --------
other identifying information of each MBE Center which is a party to a
Subscription Agreement (as defined in Section 3(b)).

     (o) "Manifest" means the exclusive MBE retail manifest system to be
          --------
developed by the parties hereto in accordance with the Specifications.

                                      -2-
<PAGE>

     (p) "MBE Center" shall mean each franchise of MBE operating a franchise
          ----------
retail outlet within the United States which enters into a Subscription
Agreement.

     (q) "MBE-Generated Customer" shall mean any In-Center Customer, Remote
          ----------------------
Self-Service Customer or MBE Internet Customer.

     (r) "MBE Internet Customer" shall have the meaning set forth on Exhibit C.
          ---------------------                                      ---------

     (s) "MBE Sites" shall mean the web sites operated by MBE on the Internet
          ---------
during the term of this Agreement, including but not limited to the websites
currently located at www.mbe.com and www.mbeonline.com.

     (t) "Remote Self-Service Customer" shall have the meaning set forth on
          ----------------------------
Exhibit C.
---------

     (u) "Specifications" shall mean the specifications for the Manifest set
          --------------
forth on Exhibit D, as updated from time to time during the term of this
         ---------
Agreement in accordance with the terms of this Agreement.

     (v) "Stations" shall mean the retail manifest shipping stations within each
          --------
MBE Center and the remote off-site manifest shipping stations, in each case
within the United States, of any MBE Center utilizing Authorized Equipment.

     (w) "Service" shall mean the combination of the Company Technology and the
          -------
Manifest.

     (x) "Service Documentation" shall mean all manuals, instructions or other
          ---------------------
information provided by the Company to MBE or MBE Centers which directly relate
to the functionality and operation of the Service.

     (y) "Third Party/Company Customer" shall have the meaning set forth on
          ----------------------------
Exhibit C.
---------

     (z) "Third Party/MBE Customer" shall have the meaning set forth on
          ------------------------
Exhibit C.
---------

     (aa) "Update" shall mean any and all bug fixes, error corrections, and
           ------
maintenance updates of the Service.

2.   Development, Delivery and Acceptance.
     ------------------------------------

     (a) Development License. Each party hereby grants to the other party a
         -------------------
[***]* (except as provided in Section 18(b)("Assignment")), [***]* (with no
 ---                                                         ---
right to sublicense except as set forth below) under all of its Intellectual
Property Rights to use, reproduce, modify, and create derivative works of each
party's preexisting Intellectual Property Rights solely as is reasonably and
actually necessary to complete the development of the Service. Each party may
grant sublicenses to contractors or subcontractors it engages to work on the
Service, provided

----------
     *  Confidential treatment has been requested for the bracketed portion. The
confidential redacted portion has been omitted and filed separately with the
Securities and Exchange Commission.

                                      -3-
<PAGE>

that any such subcontractor has entered into an enforceable agreement reasonably
acceptable to the other party relating to the assignment of Intellectual
Property Rights.

     (b) Delivery. The Company shall use its commercially reasonable best
         --------
efforts to complete the design of the Manifest and the Service in a timely and
professional manner consistent with commercial software industry standards on or
before August 1, 1999 and deliver the URL and the access codes or passwords
necessary to use the Service to MBE and each subscribing MBE Center on or before
September 1, 1999. MBE and MBE Centers shall provide any assistance reasonably
requested by the Company in connection with completing such design and effecting
such delivery. The parties shall cooperate to implement a beta roll-out of the
Service in approximately 100 Designated Locations of MBE Centers selected by
mutual agreement of the Company and MBE on or before September 1, 1999, and
thereafter shall mutually agree on a plan to make the Service available to all
MBE Centers by no later than October 1, 1999.

     (c) Inspection. Following the completion of the beta roll-out and testing
         ----------
of the Service, MBE shall have a period of twenty (20) business days to
undertake inspection and testing of the Manifest to determine conformance with
applicable Specifications. The Company shall provide any assistance reasonably
requested by MBE in assessing such conformance. If MBE finds that any part of
the Manifest does not conform with the applicable Specifications, MBE shall,
within the inspection period, notify the Company and provide a detailed written
description of such nonconformance. Following confirmation by the Company of
such nonconformance, the Company will alter the Manifest within a reasonable
time to correct such nonconformance.

     (d) Acceptance. Upon verification by MBE that the Manifest conform with the
         ----------
Specifications in all material respects, or if MBE fails to notify the Company
within the twenty (20) business day inspection period, the Service shall be
deemed Accepted. MBE's sole remedy for correction of problems after Acceptance
shall be under the Warranties set forth in Section 11.

3.   Provision of Service.
     --------------------

     (a) Scope of Agreement. Any Service Documentation provided to MBE and/or
         ------------------
MBE Centers by the Company shall be subject to all terms and conditions of this
Agreement. All use of and access to the Service by MBE and all MBE Centers shall
also be subject to all terms and conditions of this Agreement.

     (b) Service. The Company will operate the Service at its network operating
         -------
center. The Company shall bear all costs associated with the network operating
center, including without limitation hardware and software, networking equipment
and bandwidth charges, redundant storage and/or mirroring across multiple
geographic locations, and maintenance; provided, however, that Company and MBE
                                       --------  -------
shall each pay one-half of the costs and expenses associated with transmitting
information and data from the servers maintained or used by the Company to the
VSAT network hub, including hardware and backhaul circuits. The Company will
make the Service available to MBE Centers via one or more secure Internet sites.
Each MBE Center approved by MBE that wishes to participate in the Service shall
enter into a Subscription Agreement with the Company in a form to be mutually
agreed upon by the parties, which form

                                      -4-
<PAGE>

shall include appropriate obligations of the MBE Centers as set forth in this
Agreement (the "Subscription Agreement"). MBE agrees to use its commercially
                ----------------------
reasonable best efforts to facilitate the execution of a Subscription Agreement
by each participating MBE Center within a reasonable amount of time after the
Effective Date. The Company hereby grants the MBE Centers a [***]* under all of
                                                             ---
Company's Intellectual Property Rights solely to access and use the Service in
accordance with the terms and conditions of this Agreement and the Subscription
Agreement.

     (c) Authorized Equipment. Each MBE Center shall be responsible for
         --------------------
obtaining, installing and maintaining the Authorized Equipment at its sole cost
and expense. The Subscription Agreement shall provide that an MBE Center that
accesses or uses the Service on any hardware or other equipment, or in
conjunction with any software, that does not constitute Authorized Equipment
does so as its own risk, and the Company shall not be liable for any failure of
the Service on hardware or other equipment, or in conjunction with any software,
that does not constitute Authorized Equipment.

     (d) Exclusivity
         -----------

         (i)   The Company shall not enter into any agreement or arrangement,
     including without limitation any sale, license, service agreement,
     co-branding agreement, co-marketing agreement or linking agreement with any
     provider of manifesting or shipping services through non-carrier retail
     shipping locations; provided, however, that:

               (A) the Company may provide listings of carrier drop-boxes or
     carrier-owned counter drop-off locations specific to a particular carrier
     (including, without limitation, locations within retail establishments) on
     the Company Site, provided that such listings do not include retail
     shipping locations, including UPS authorized shipping outlets, FedEx
     authorized shipping centers and other commercial mail receiving agencies;
     and

               (B) the Company may enter into any such agreement or arrangement
     so long as MBE is given advance written notice of such agreement or
     arrangement and such agreement or arrangement prohibits the use of the
     Manifest or any Company Technology to manifest or ship packages for retail
     customers and provided further that Company terminates service to any such
     entity that uses the Manifest or any Company Technology to serve retail
     customers.

         (ii)  MBE shall not enter into any agreement or arrangement with any
     provider of an online or Internet-based manifest system other than the
     Company.

         (iii) The Company may, at its option, terminate the exclusivity
     provisions set forth in this Section 3(d) upon the occurrence of any of the
     following events: (A) MBE

----------
     *  Confidential treatment has been requested for the bracketed portion. The
confidential redacted portion has been omitted and filed separately with the
Securities and Exchange Commission.

                                      -5-
<PAGE>

     and all MBE Centers together fail to ship at least [***]* packages
                                                         ---
     manifested by the Service in any period of three (3) full months commencing
     on the earlier of (x) March 1, 2000, and (y) the use of the Service to
     manifest packages by at least [***]* MBE Centers (other than any such
                                    ---
     failure which is directly caused by an event of force majeure (as set forth
     in Section 18(e) or by the failure of the Service to operate in accordance
     with the Specifications or by the Company's breach of any of its
     obligations hereunder), or (B) MBE ceases to own at least [***]* shares of
                                                                ---
     common stock of the Company (calculated on an as-converted basis and as
     adjusted for any stock split, stock dividend, recapitalization or similar
     transaction).

         (iv)  Beginning 18 months after the Effective Date, MBE may, at its
     option, terminate the exclusivity provisions set forth in this Section 3(d)
     if (A) MBE and all MBE Centers together fail to ship at least [***]*
                                                                    ---
     packages manifested by the Service in any three (3) full month period
     ending 18 months after the Effective Date and (B) such failure to meet the
     volume requirements set forth above is related to the unsatisfactory
     performance of the Service as evidenced by written communications from a
     commercially significant number of MBE Centers.

4.   Support; Training.
     -----------------

     (a) Updates and Service Revisions. The Company will make Updates to the
         -----------------------------
Service in accordance with the requirements set forth in the Specifications at
no charge for the entire term of this Agreement. Without limiting the foregoing,
the Service shall be updated from time to time during the term of this Agreement
to include accurate and current (i) Listings and (ii) pricing and service
descriptions for each carrier supported by the Manifest, in each case as soon as
reasonably practicable following the receipt by the Company of such Listings,
pricing and service descriptions. As reasonably necessary, the Company shall
update the Specifications to reflect such Updates and shall provide a copy of
same to MBE at least once per calendar quarter. If the Company develops
additional Intellectual Property Rights that are made available without
development charge to other customers of the Company, the Company will also make
such Intellectual Property Rights available to MBE without development charge.

     (b) MBE Center Support. MBE shall have the right to designate in writing up
         ------------------
to five (5) second-level support personnel individuals and alternates to such
individuals as contact persons (the "Contact Persons") (although the parties may
                                     ---------------
mutually agree to increase such number of Contact Persons to ensure adequate
support exists for the MBE Centers) Such Contact Persons shall interface with
the MBE Centers with respect to matters relating to the Service and may transmit
request assistance and descriptions of problems encountered with the Service to
the Company via electronic mail, fax, or overnight mail. The Company will
provide telephone support to the Contact Persons at a level and in such a manner
as the parties mutually agree to be adequate. The Company shall use reasonable
efforts to provide the Contact Persons with answers and solutions to problems
encountered by MBE or the MBE Center in the course of MBE's or MBE Centers'
normal and proper use of the Service in accordance with the terms and

----------
     *  Confidential treatment has been requested for the bracketed portion. The
confidential redacted portion has been omitted and filed separately with the
Securities and Exchange Commission.

                                      -6-
<PAGE>

conditions of this Agreement. Only the Contact Persons may contact the Company
in connection with matters relating to technical support, and the Company shall
have no obligation to answer questions or assist MBE or MBE Centers' personnel
other than the Contact Persons. The Company shall provide a reasonable amount of
training and training materials to the Contact Persons to provide the Contact
Persons with information concerning the Service and to assist the Contact
Persons in providing support to the MBE Centers and other personnel of MBE. MBE
shall take reasonable steps to ensure that MBE Centers and personnel of MBE
other than the Contact Persons do not contact the Company directly with respect
to issues relating to support of the Service. The Company shall take reasonable
steps to provide adequate industry standard support of all Internet users of the
Company Site and other sites using the Company Technology. MBE and MBE Centers
may refer all support questions relating directly to the Company Site or the
Company Technology to the Company in accordance with the foregoing.

5.   Records; Audits.
     ---------------

     The Company shall maintain complete and accurate records of the number of
packages shipped by the MBE Centers using the Service and all payments due or
accrued to the Company by MBE Centers hereunder. MBE shall, at any time during
the term of this Agreement, be entitled to audit all such records upon ten (10)
days written notice to the Company, in order to confirm the accuracy of such
records and conformance with the terms and conditions of this Agreement;
provided, however, that no more than one (1) such audit may be conducted in any
--------  -------
ninety (90)-day period. Any such audit shall be performed at MBE's expense
during the Company's normal business hours; provided, however, that in the event
                                            --------  -------
that such audit reveals any non-compliance with any term of this Agreement by
the Company, the Company shall bear the cost of such audit.

6.   Additional Development.
     ----------------------

     (a) Request for Proposal. From time to time, MBE may request additional
         --------------------
custom software or other custom development to be provided by the Company under
this Agreement. If MBE has a requirement for a specific enhancement or
modification of the Service, MBE will identify to the Company in writing a
summary of such requirement (the "Request for Proposal"). Such Request for
                                  --------------------
Proposal will provide a description sufficient to enable the Company to
determine the general demand for and its plans, if any, to develop the same or
similar enhancements or modifications.

     (b) Terms and Conditions. If the Company decides that it has the technical
         --------------------
ability to fulfill the Request for Proposal, then the Company will respond to
MBE within forty-five (45) days of receiving the Request for Proposal, stating
the terms and conditions upon which the Company would be able to undertake such
development, including, but not limited to, changes to the Specifications,
custom development charges, and a proposed delivery schedule.

     (c) Development and Billing Rates. The Company shall perform such
         -----------------------------
development in accordance with the highest professional standards. The cost of
such development shall be the Company's standard billing rates then in effect
(in addition to reimbursement of any expenses, in accordance with the Company's
standard practices), which shall be paid by MBE within thirty (30) days of
receipt of an invoice therfor. No additional fees or bounties shall be owed or

                                      -7-
<PAGE>

payable in connection with such development, unless such development results in
a revenue-generating feature or functionality of the Service which is outside of
the scope of the Specifications, in which case the parties shall negotiate in
good faith to mutually agree upon a reasonable fee mechanism therefor and/or
reimbursement of development expenses. Upon completion of such additional
development, the Company shall update the Specifications to reflect such
additional development and shall provide a copy of same to MBE.

     (d) Credit. MBE shall receive a credit applicable to such billing rates
         ------
(but not to reimbursement of expenses) for any development performed by the
Company under this Section 6 equal to [***]* of the total fees paid by MBE and
                                       ---
all MBE Centers, which credit shall be reflected on a monthly statement by the
Company to MBE. Any such credit must be used within twelve (12) months of
receipt of payment by the Company.

7.   Ownership.
     ---------

     (a) General. The Company will have full and exclusive right, title and
         -------
ownership interest in and to the Service and the Specifications and the
Intellectual Property Rights therein. The Company is, and shall be, the sole
owner of all inventions, discoveries and/or enhancements relating to the Service
and the Specifications, including all copies, translations, compilations,
partial copies, derivative works and updated works, whether partial or complete
and whether or not merged into other program materials and whether in written or
unwritten form. Except as authorized by this Agreement (including MBE's right to
use the Specifications as set forth in Section 15(d)(iv)) or as otherwise agreed
in writing, MBE and MBE Centers may not, directly, or through any person or
entity, in any form or manner, copy, distribute, reproduce, incorporate, use or
allow access to the Service or the Specifications, or modify, prepare derivative
works of, decompile, reverse engineer, disassemble or otherwise attempt to
derive source code or object code from the Service or the Specifications.

     (b) Proprietary Notices. MBE will ensure that all copies of Service
         -------------------
Documentation made in accordance with this Agreement will incorporate copyright
and other proprietary notices in the same manner that the Company incorporates
such notices in the Service or in any manner reasonably requested by the
Company, and MBE agree not to delete or modify any such notices incorporated in
the Service Documentation in any respect. MBE will also permit the Company to
enter any of MBE's premises during regular business hours to inspect the use of
the Service in any reasonable manner. The Subscription Agreement shall provide
that MBE Centers will comply with the terms of this Section 7(b).

     (c) List of Trademarks. Each party (the "Granting Party") hereby grants the
         ------------------                   --------------
other party (the "Using Party") a limited license to use its Brand Features in
                  -----------
connection with the marketing, distribution, provision of access to, and support
of the Service. The Using Party agrees that such Brand Features are the
exclusive property of the Granting Party and that all usage of such marks and
any goodwill established by the use of such marks shall inure to the benefit of
the Granting Party and that this Agreement does not confer any goodwill or other

----------
     *  Confidential treatment has been requested for the bracketed portion. The
confidential redacted portion has been omitted and filed separately with the
Securities and Exchange Commission.

                                      -8-
<PAGE>

interests in such marks on the Using Party The Using Party will comply with the
Granting Party's Brand Guidelines. The Using Party shall provide to the Granting
Party examples of any use of the Brand Features of the Granting Party prior to
use. The Using Party shall modify or discontinue such use if requested by the
Granting Party. Neither party shall adopt or attempt to register any trademark,
trade name, or service mark which is confusingly similar to the other party's
Brand Features such as "Ship Mailboxes" (and the like).

     (d) Customer Information. The Company and MBE shall jointly own (without
         --------------------
duty to account) all customer lists and related customer data gathered through
the use of the Service by customers of MBE and MBE Centers ("Customer Data").
                                                             -------------
During the term of this Agreement, neither party shall provide any Customer Data
to any third party (other than MBE Centers or an affiliate of MBE or the
Company) without the prior written consent of the other party The Company shall
initially provide the Customer Data to MBE in acceptable electronic format as
soon as practicable following the reasonable request of MBE, and, once MBE (at
its sole cost and expense) has implemented an appropriate means to warehouse the
Customer Data, the parties shall take reasonable steps to transfer all existing
Customer Data to MBE and implement a system whereby the Customer Data is
automatically downloaded and provided to MBE on a periodic basis. The Company
agrees to retain the Customer Data in accordance with the Company's own data
retention policies, and in any case for no less than 13 months from the creation
of such Customer Data. The Company, MBE, affiliates of the Company and MBE, and
the MBE Centers may each use the Customer Data for marketing and other purposes
in accordance with a mutually agreed upon privacy policy and in accordance with
any mutually agreed upon privacy policy displayed to customers in connection
with the Service. Notwithstanding the foregoing, the Company agrees not to use
any Customer Data to solicit any MBE-Generated Customers with respect to any
services offered by the Company; provided, however, that the Company may use
Customer Data to solicit such customers who have a shipping account with a
carrier or with respect to services not offered by MBE and the MBE Centers.
Notwithstanding the foregoing, MBE agrees not to use any Customer Data in any
manner which would reasonably be expected to eliminate any Bounty Package
payment to the Company hereunder.

     (e) Reserved Rights. Without limitation of the foregoing, each party
         ---------------
reserves all rights other than those expressly granted in this Agreement, and no
licenses are granted except as expressly set forth herein.

     (f) Notices. Each party agrees to display mutually agreeable trademark and
         -------
copyright notices or legends of the other party when using such other party's
Brand Features. Each party shall in advance submit to the other party the
proposed placement of such notices or legends (including, without limitation,
the place and manner of incorporation into electronic media or transmissions),
and such other party shall have the right, acting reasonably, to approve the
same.

8.   Payments; Taxes.
     ---------------

     (a) Basic Fee. In consideration for the Service provided hereunder, for
         ---------
each package shipped utilizing the Service (other than a package which is
shipped first class by the U.S. Postal

                                      -9-
<PAGE>

Service), the Company shall be entitled to receive the amount of [***]* (the
                                                                  ---
"Basic Fee"). MBE agrees to use its commercially reasonable efforts to execute
 ---------
agreements, or to facilitate the execution of agreements among the appropriate
parties, so that such Basic Fee is paid to the Company directly from the carrier
which ships such package no later than fifteen (15) days following the end of
the month in which such package was shipped. If MBE is unable, despite its
commercially reasonable efforts, to facilitate the execution of such an
agreement with one or more carriers, the Basic Fee shall be paid by each MBE
Center directly pursuant to the terms of the Subscription Agreement.

     (b) Bounty Fee. In further consideration for the Service and the other
         ----------
obligations of the Company hereunder, for each package shipped by or through an
MBE Center by a Bounty Customer who pays the shipping rates charged by such MBE
Center, ("Bounty Package"), the Company shall be entitled to receive the
          --------------
following amounts (the "Bounty Fee") from each such MBE Center, for Bounty
                        ----------
Packages shipped during each calendar month:

         (i)   in the event that less than [***]* Bounty Packages shall have
                                            ---
been shipped by the MBE Centers during the twelve (12) full months prior to the
shipping of such Bounty Package (or, if such information is not yet available
for the month prior to the month in which such Bounty Package is shipped, the
most recent twelve (12) full months for which such information is available)
(the "Measurement Period"), the amount of [***]* per Bounty Package shipped via
      ------------------                   ---
air transportation and the amount of [***]* per Bounty Package shipped via
                                      ---
ground transportation;

         (ii)  in the event that at least [***]* but less than [***]* Bounty
                                           ---                  ---
Packages have been shipped by the MBE Centers during the Measurement Period, the
amount of [***]* per Bounty Package shipped via air transportation and the
           ---
amount of [***]* per Bounty Package shipped via ground transportation;
           ---

         (iii) in the event that at least [***]* but less than [***]* Bounty
                                           ---                  ---
Packages shall have been shipped by the MBE Centers during the Measurement
Period, the amount of [***]* per Bounty Package shipped via air transportation
                       ---
and the amount of [***]* per Bounty Package shipped via ground transportation;
                   ---
and

         (iv)  in the event that at least [***]* Bounty Packages shall have been
                                           ---
shipped by the MBE Centers during the Measurement Period, the amount of [***]*
                                                                         ---
per Bounty Package shipped via air transportation and the amount of [***]* per
                                                                     ---
Bounty Package shipped via ground transportation.

     (c) eBay Fee. In further consideration for the Service and the other
         --------
obligations of the Company hereunder, for each package shipped by or through an
MBE Center by an eBay Customer ("eBay Package"), the Company shall be entitled
                                 ------------
to receive the following amounts from such MBE Center for eBay Packages shipped
during each calendar month, in each case

----------
     *  Confidential treatment has been requested for the bracketed portion. The
confidential redacted portion has been omitted and filed separately with the
Securities and Exchange Commission.

                                      -10-
<PAGE>

after deduction of the lesser of (x) [***]* and (y) the amount paid or to be
                                      ---
paid by such eBay Customer directly to the Company with respect to the shipment
of such package (the "eBay Fee"):
                      --------

         (i)   in the event that at least [***]* but less than [***]* eBay
                                           ---                  ---
Packages have been shipped by MBE and the MBE Centers during the Measurement
Period, the amount of [***]* per eBay Package shipped via air transportation and
                       ---
the amount of [***]* per eBay Package shipped via ground transportation;
               ---

         (ii)  in the event that at least [***]* but less than [***]* eBay
                                           ---                  ---
Packages shall have been shipped by the MBE Centers during the Measurement
Period, the amount of [***]* per eBay Package shipped via air transportation and
                       ---
the amount of [***]* per eBay Package shipped via ground transportation; and
               ---

         (iii) in the event that at least [***]* eBay Packages shall have been
                                           ---
shipped by the MBE Centers during the Measurement Period, the amount of [***]*
                                                                         ---
per eBay Package shipped via air transportation and the amount of [***]* per
                                                                   ---
eBay Package shipped via ground transportation.

     (d) Payment Cycle. The Company shall bill and collect all amounts due to
         -------------
the MBE Centers for Bounty Packages and eBay Packages from each Bounty Customer
or eBay Customer, as the case may be, by processing credit card transactions
over the Internet. The Company shall pay such amounts, less the relevant Bounty
Fee or eBay Fee then in effect, to MBE on the next business day or as soon as
reasonably practicable (but in any event within one week) following the shipment
date of each package, and MBE agrees to distribute such amounts to the MBE
Centers. At the Company's option, Bounty Customers or eBay Customers may also be
entitled to pay directly for the shipment of such Bounty Package or eBay Package
at MBE Centers, and the Company shall be entitled to deduct the relevant Bounty
Fee or eBay Fee then in effect from any payments due to such MBE Center for
shipment of Bounty Packages, eBay Packages or otherwise.

     (e) Right of Offset. In the event of any default in payment by an MBE
         ---------------
Center under this Section 8 which continues uncured for a period of thirty (30)
days, in addition to any rights or remedies which the Company may have at law or
equity or pursuant to this Agreement, the Company shall have the right (but not
the obligation) to (i) terminate providing the Service to such MBE Center and
(ii) offset any amounts owed to the Company by such MBE Center from any payments
owed to such MBE Center by the Company.

     (f) Taxes. MBE shall pay or reimburse the Company for all taxes, duties and
         -----
assessments imposed on MBE or the Company in connection with the license or use
of the Service by MBE under this Agreement, including without limitation all
sales, use, excise and other taxes and duties, excluding only taxes based upon
the Company's net income. MBE shall

----------
     *  Confidential treatment has been requested for the bracketed portion. The
confidential redacted portion has been omitted and filed separately with the
Securities and Exchange Commission.

                                      -11-
<PAGE>

hold the Company harmless from all claims and liability arising from MBE's
failure to report or pay any such taxes, duties and assessments.

     (g) [***]*
          ---

     (h) Independent MBE Centers. Notwithstanding any other provision of this
         -----------------------
Agreement, Company acknowledges and agrees that each participating MBE Center is
an independently owned and operated franchise and that MBE is not responsible
for any debts or acts or omissions of its franchisees. Each use by an MBE Center
of the Service shall be pursuant to the terms and conditions of a Subscription
Agreement and each participating MBE Center shall be responsible for paying to
Company any charges incurred. Company further acknowledges that each
participating MBE Center may choose to make the Service (or some portion
thereof) available to customers of MBE Centers.

9.   Co-Marketing Obligations.
     ------------------------

     (a) Listings. MBE shall supply and regularly update the Listings, and the
         --------
Company shall include the Listings in the Company Site and shall use
commercially reasonable best efforts to include such Listings on other third
party web sites utilizing the Company Technology.

     (b) Mutual Links. During the term of this Agreement, each party will ensure
         ------------
that the relevant pages in each party's website will include Links to the other
party's site(s). Without limiting the foregoing, and within the first three (3)
months following the Effective Date, the Company shall assist MBE at no
additional charge in developing a series of Links between the MBE Site and the
Company Site. The purpose of such Links shall be to allow MBE Internet Customers
to access certain agreed-upon features provided by the Company Site. At a
minimum, such functionality shall be equivalent to that provided by the Company
Site to public Internet users. As mutually agreed upon by the parties, the
parties may place advertising banners promoting their products and services on
appropriate pages of the other party's website.

     (c) Marketing and Public Relations. So long as such activities are in
         ------------------------------
compliance with MBE Brand Guidelines then in effect (i) the Company shall
display the logo of MBE on the Company Site and identify MBE as the exclusive
retail shipping partner of the Company, (ii) to the extent reasonably
practicable, the Company shall include the logo of MBE on every carrier or
shipping label generated pursuant to this Agreement and (iii) the parties agree
to use reasonable efforts to cooperate to develop a co-branded Company/MBE logo
to display on Internet-generated shipping labels generated pursuant to this
Agreement.

10.  Confidential Information.
     ------------------------

     (a) Limited Access. MBE and MBE Centers agree not to provide or otherwise
         --------------
make available any Service Documentation or other Confidential Information of
the Company to any person other than employees, consultants, contractors or
agents of MBE and MBE Centers with a

----------
     *  Confidential treatment has been requested for the bracketed portion. The
confidential redacted portion has been omitted and filed separately with the
Securities and Exchange Commission.

                                      -12-
<PAGE>

need to use such Service Documentation or Confidential Information in accordance
with the terms of this Agreement.

     (b) Confidentiality. Each party shall treat as confidential all
         ---------------
Confidential Information of the other party, shall not use such Confidential
Information except as set forth in this Agreement, and shall use reasonable
efforts not to disclose such Confidential Information to any third party.
Without limiting the foregoing, each of the parties shall use at least the same
degree of care which it uses to prevent the disclosure of its own confidential
information of like importance to prevent the disclosure of Confidential
Information disclosed to it by the other party under this Agreement. Each party
shall promptly notify the other party of any actual or suspected misuse or
unauthorized disclosure of the other party's Confidential Information.

     (c) Exceptions. Each party agrees not to disclose or otherwise make such
         ----------
Confidential Information available to third parties without the other party's
prior written consent except to the extent that the Confidential Information (i)
was in the public domain at the time it was disclosed or has entered the public
domain through no fault of such party, (ii) was known to such party, without
restriction, at the time of disclosure, as demonstrated by files in existence at
the time of disclosure, (iii) is disclosed with the prior written approval of
the other party, (iv) was independently developed by such party without any use
of Confidential Information, (v) became known to such party, without
restriction, from a source other than the other party without breach of this
Agreement by such party and otherwise not in violation of the other party's
rights, (vi) is required to be disclosed under securities laws or (vii) is
disclosed pursuant to the order or requirement of a court, administrative
agency, or other governmental body; provided, however, that such party shall use
                                    --------  -------
all reasonable efforts to provide prompt, written, and sufficient advance notice
thereof to the other party to enable the other party to seek a protective order
or otherwise prevent or restrict such disclosure. Each party agrees that to take
appropriate action by instruction, agreement, or otherwise with its employees,
agents and representatives to satisfy such party's obligations under this
Agreement with respect to use, copying, modification, protection and security of
Confidential Information.

     (d) Return of Confidential Information. Upon expiration or termination of
         ----------------------------------
this Agreement, each party shall return all Confidential Information received
from the other party.

     (e) Confidentiality of Agreement. Each party shall be entitled to disclose
         ----------------------------
the existence of this Agreement, but agrees that the terms and conditions of
this Agreement shall be treated as Confidential Information and shall not be
disclosed to any third party; provided, however, that each party may disclose
                              --------  -------
the terms and conditions of this Agreement; (i) as required by any court or
other governmental body; (ii) as otherwise required by law, (iii) to legal
counsel of the parties; (iv) in confidence, to accountants, banks, and financing
sources and their advisors; (v) in connection with the enforcement of this
Agreement or rights under this Agreement; or (vi) in confidence, in connection
with an actual or proposed merger, acquisition, or similar transaction.

11.  Representations, Warranties and Covenants.
     -----------------------------------------

     (a) Warranty. Company represents and warrants that during the term of this
         --------
Agreement the Service shall confirm to its specifications and the Specifications
in all material

                                      -13-
<PAGE>

respects, provided that the Service is properly used in accordance with the
terms of this Agreement and the Subscription Agreement, and shall not contain a
higher number of, or more serious errors, than would be expected by a reasonable
commercial user of a service similar to the Service.

     (b) Outages. After Acceptance and during the term of this Agreement,
         -------
Company will use its best efforts to make the Service available to the MBE
Centers from 4 a.m. to 9 p.m. PST every day. Scheduled maintenance which may
result in an interruption to the Service shall be performed outside of these
hours. Each party shall provide the other party with reasonable and prompt
notification of all known failures of the Service to be operational during these
hours ("Outages"). The Company shall make qualified personnel available to MBE
personnel by telephone, e-mail or pager (response within twenty (20) minutes)
for the reporting of Outages at no additional charge. Company will then use its
best efforts to resolve the Outage as soon as possible. Within six months of the
Effective Date, the Company and MBE will jointly develop a disaster recovery
plan outlining plans to respond to Outages.

     (c) No Conflicts. The Company is not currently subject and throughout the
         ------------
term will not be subject to any obligations or disabilities that will or might
prevent or interfere with fully keeping and performing all of the agreements,
covenants and conditions to be kept or performed hereunder, and the Company has
not made nor will make any agreement, commitment, grant or assignment, and will
not do, or omit to do, any act or thing that could or might interfere or impair
the complete enjoyment of the rights granted and the Services to be provided
hereunder.

     (d) Originality. The Company represents and warrants that it currently has
         -----------
and throughout the term will have full title to and ownership of (or licenses
to) the Service and all Intellectual Property Rights embodied in or used in
connection therewith, free and clear of liens, claims and encumbrances, and that
it has full power and authority to grant the rights provided herein.

     (e) Year 2000. Company represents, warrants and covenants that the Service
         ---------
includes design, performance and functionality such that the Service will not
generate any invalid and/or incorrect date-related results when used during any
year prior to, during or after the calendar year 2000.

     (f) Remedies. The Company's sole and exclusive liability and MBE's sole and
         --------
exclusive remedy for breach of the representations and warranties set forth in
this Section 11 shall be, at the Company's election, to either (i) use its best
efforts to make the Service perform in accordance with the Specifications in all
material respects as soon as reasonably practicable, or (ii) return the Fees
paid by MBE and MBE Centers for the Service in which case MBE would have the
right to either terminate the entire Agreement or the portions of the Agreement
affected by breach of the representation and warranties. In the event that the
Company elects (i) of this sub-section in accordance with the terms and
conditions set forth herein and is unable to make the Service perform in
accordance with the Specifications in all material respects within twenty one
(21) days after such election, MBE may then elect to continue to proceed under
(i) or MBE may elect to proceed under (ii) of this sub-section.

                                      -14-
<PAGE>

     (g) Disclaimer. EXCEPT FOR THE EXPRESS WARRANTIES STATED ABOVE, NEITHER
         ----------
PARTY MAKES ANY PROMISES, REPRESENTATIONS OR WARRANTIES, EITHER EXPRESS,
IMPLIED, STATUTORY, OR OTHERWISE, WITH RESPECT TO THE SYSTEM OR THE MANIFEST,
INCLUDING ITS CONDITION, ITS CONFORMITY TO ANY REPRESENTATION OR DESCRIPTION, OR
THE EXISTENCE OF ANY LATENT OR PATENT DEFECTS, AND EACH PARTY SPECIFICALLY
DISCLAIMS ALL IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
PURPOSE AND NONINFRINGEMENT OF THIRD PARTY INTELLECTUAL PROPERTY RIGHTS.

12.  Indemnity for Patent or Copyright Infringement.
     ----------------------------------------------

     (a) Indemnity. The Company will defend, at its expense, any action brought
         ---------
against MBE and its directors, officers, employees, agents, affiliates,
successors, assigns or franchisees ("Indemnitees") based upon a claim that the
Service used properly in accordance with the terms of this Agreement and the
Subscription Agreement infringes a U.S. patent or copyright or misappropriates a
trade secret under U.S. law (a "Claim"). The Company further agrees to pay all
damages and costs (including reasonable attorneys' fee and expert witness fees)
incurred by any Indemnitee in connection with such Claim. The Company shall have
sole control of any such action or settlement negotiations. Without the consent
of MBE, which shall not be unreasonably withheld, the Company shall not settle
any such Claim in a manner that (i) imposes damages or costs on any Indemnitee
not covered by the Company hereunder or (b) imposes any injunctive or other
non-monetary relief on any Indemnitee. MBE shall notify the Company promptly in
writing of each such Claim and gives the Company all authority, information and
assistance, at the Company's expense, reasonably necessary to settle or defend
such claim.

     (b) Remedy Options. If the Service becomes, or in the opinion of the
         --------------
Company may become, the subject of a claim of infringement of any U.S. patent or
copyright, the Company shall notify MBE, and the Company may, at its option: (i)
procure for MBE and MBE Centers the right to use the Service free of any
liability or (ii) replace or modify the Service to make it non-infringing.

     (c) Sole and Exclusive Liability. THIS SECTION 12 SETS FORTH THE SOLE AND
         ----------------------------
EXCLUSIVE LIABILITY OF THE COMPANY FOR INFRINGEMENT OF THIRD PARTY INTELLECTUAL
PROPERTY RIGHTS.

     (d) Exclusions from Indemnification. The Company assumes no liability, and
         -------------------------------
shall have no obligation to defend or pay any amounts to any Indemnitee
hereunder for (i) any method or process in which the Service may be used by MBE
or any MBE Center which is not set forth in the Specifications, (ii) any
improper use of the Service by an Indemnitee or (iii) the combination, operation
or use of the Service with non-Company software or data, if such infringement
could have been avoided but for the combination, operation or use of the Service
with such programs or data.

13.  Indemnification.
     ---------------

     (a) Indemnification by the Company. The Company, at its own expense, will
         ------------------------------
indemnify, defend and hold harmless MBE, and its employees, franchisees,
representatives and

                                      -15-
<PAGE>

agents, against any claim, suit, action, or other proceeding brought against MBE
or such party, to the extent that such claim, suit, action or other proceeding
is based on or arises from.

         (i)   any misrepresentation or breach or representation or warranty of
the Company contained herein; or

         (ii)  any breach of any covenant or agreement to be performed by the
Company hereunder.

     The Company will pay all costs, damages, and expenses, including, but not
limited to, reasonable attorneys' fees and costs awarded against or otherwise
incurred by MBE in connection with or arising from any such claim, suit, action
or proceeding attributable to any such claim.

     (b) Indemnification by MBE. MBE, at its own expense, will indemnify, defend
         ----------------------
and hold harmless the Company, and its employees, representatives and agents,
against any claim, suit, action, or other proceeding brought against the Company
or such party, to the extent that such claim, suit, action or other proceeding
is based on or arises from:

         (i)   any misrepresentation or breach of representation or warranty
of MBE contained herein; or

         (ii)  any breach of any covenant or agreement to be performed by MBE
hereunder.

     MBE will pay all costs, damages, and expenses, including, but not limited
to, reasonable attorneys' fees and costs awarded against or otherwise incurred
by the Company in connection with or arising from any such claim, suit, action
or proceeding attributable to any such claim.

     (c) Procedures. Each party's obligation to indemnify the other hereunder
         ----------
shall be conditioned upon (i) the indemnified party providing the indemnifying
party with prompt notice of any claim that could lead to a claim for
indemnification, (ii) the indemnified party permitting the indemnifying party to
assume and control the defense of such action, with counsel chosen by the
indemnifying party (who shall be reasonably acceptable to the indemnified party)
and (iii) the indemnified party not entering into any settlement or compromise
of any such claim without the indemnifying party's prior written consent, which
shall not be unreasonably withheld or delayed.

                                      -16-
<PAGE>

14.  Limitation of Liability. Notwithstanding anything to the contrary in
     -----------------------
this Agreement, in no event shall either party's liability under any provision
of this Agreement or otherwise arising out of or related to this Agreement
(other than payments due or accrued under Section 8, exceed the amounts paid by
MBE and the MBE Centers to the Company pursuant to this Agreement. The parties
further agree that NEITHER PARTY WILL BE LIABLE FOR ANY LOST PROFITS, FOR COSTS
OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES OR FOR ANY CLAIM OR DEMAND
AGAINST A PARTY BY ANY OTHER PARTY. IN NO EVENT WILL EITHER PARTY BE LIABLE FOR
CONSEQUENTIAL, INCIDENTAL, SPECIAL, INDIRECT, OR EXEMPLARY DAMAGES ARISING OUT
OF THIS AGREEMENT, EVEN IF A PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
DAMAGES, AND UNDER ANY CAUSE OF ACTION, INCLUDING NEGLIGENCE. THESE LIMITATIONS
SHALL APPLY NOTWITHSTANDING ANY FAILURE OF ESSENTIAL PURPOSE OF ANY LIMITED
REMEDY.

15.  Term and Termination.
     --------------------

     (a) Term and Renewal Option. The initial term of this Agreement shall
         -----------------------
commence on the Effective Date and end on the fifth anniversary of the Effective
Date. MBE shall have the right to elect by written notice to the Company at any
time between two (2) and six (6) months prior to the end of such initial term or
any subsequent Renewal Period (as defined below), to notify the Company that MBE
elects to seek to extend such term for additional two (2)-year periods (each a
"Renewal Period") In the event of such election, MBE and the Company shall have
 --------------
a period of sixty (60) days in which to negotiate commercially reasonable Basic
Fees, Bounty Fees and eBay Fees (and other applicable fees) ("Fee Schedule")
                                                              ------------
under which the Company would be willing to renew this Agreement for such
Renewal Period. If the parties are unable to reach agreement during such sixty
(60) day period, either party may request that the Fee Schedule be submitted to
arbitration pursuant to Section 18(m). If MBE notifies the Company of its intent
to so renew prior to the end of such initial term or such Renewal Period, the
term of this Agreement shall automatically be extended for the Renewal Period
and, other than the Fee Schedule, all of the terms and conditions of this
Agreement shall remain in full force and effect.

     (b) Termination.
         -----------

         (i)   Either party may, at its option, terminate this Agreement upon
notice to the other party if (A) the other party materially fails to comply with
any of the material terms and conditions of this Agreement and (B) if such
default has not been cured within thirty (30) days (forty five (45) days if
required by the nature of the breach) after written notice to the other party
or, if such breach is not curable within thirty (30) days (forty five (45) days
if required by the nature of the breach), reasonable efforts and progress are
not being made to cure such breach.

         (ii)  This Agreement shall terminate, without notice, (A) upon the
institution by or against either party of insolvency, receivership or bankruptcy
proceedings or any other proceedings for the settlement of such party's debts,
(B) upon either party's making an assignment for the benefit of creditors, or
(C) upon either party's dissolution or ceasing to do business.

                                      -17-
<PAGE>

     (c) Termination Period.
         ------------------

         (i)   If this Agreement is terminated or expires in accordance with
this Section 15 (other than termination by the Company in the event of an
uncured material breach by MBE), then MBE shall have a period of up to
twenty-four (24) months from and after the date of such termination, to make
arrangements with respect to the conversion of the Service to a non-Company
manifest system (the "Termination Period"). The date when the Service shall have
                      ------------------
been converted to a non-Company manifest system shall hereinafter be referred to
as the "Termination Completion Date" and shall be the effective date of
         --------------------------
termination of this Agreement, in such event. During the Termination Period each
party will continue to perform its obligations hereunder, and MBE and MBE
Centers will continue to pay any applicable fees and payments hereunder to the
Company. MBE shall keep the Company informed as reasonably necessary with
respect to such conversion. MBE also shall give the Company written notice of
the estimated Termination Completion Date promptly after a reasonably definitive
projected Termination Completion Date is known by MBE, and shall give written
notice to the Company promptly after any change in such estimated Termination
Completion Date.

         (ii)  During the Termination Period, the Company will give reasonable
cooperation and support to MBE to assure an orderly and efficient transition
and, without limiting the generality of the foregoing, at MBE's expense, the
Company shall be obligated to provide MBE with data reasonably necessary for MBE
to convert or implement the non-Company systems, procedures and practices.

     (d) Effect of Termination.
         ----------------------

         (i)   Sections 1, 7, 10, 13, 14, 15, 16 and 18, as well as any payments
accrued prior to termination of this Agreement, shall survive any termination or
expiration of this Agreement.

         (ii)  Within thirty (30) days after the Termination Completion Date,
each party shall, at its own expense, destroy or return to the Company and make
no further use of, any property, materials or other items of the other party and
shall certify, in writing that it has done so

         (iii) Nothing contained herein shall limit any other remedies that
either party may have for the default of the other party under this Agreement
nor relieve either party of any of their obligations incurred prior to
termination of this Agreement.

         (iv)  During the Termination Period and thereafter, and notwithstanding
any other provision of this Agreement, MBE will be free to use its own
personnel, and/or engage or contract with any third party to use the
Specifications to design, develop and market an Internet-based manifest system
similar to the Manifest (including products that contain functionality similar
to the Service and which have a "look and feel" similar or identical to the
Manifest), in each case solely for the benefit of MBE and the MBE Centers and
international franchisees or licensees of MBE. MBE shall not use the object code
or source code of the Manifest in the course of such development. Subject to
MBE's compliance with the provisions of this subsection (iv), the Company shall
not

                                      -18-
<PAGE>

assert any claim against MBE under the Company's Intellectual Property Rights in
the Specifications or the Manifest in connection with such development, other
than for use of the Company's trademarks, trade names, service marks and service
names. Neither party shall have the right to retain or use the specific software
implementation of the Manifest developed by the parties hereunder; provided,
however, that the Company may retain one (1) copy of the software implementation
of the Manifest solely for archival and evidentiary purposes.

16.  Publicity. Upon execution of this Agreement, the parties will jointly
     ---------
prepare a mutually acceptable description of their business relationship as
contemplated by this Agreement which may be used by either party in press
releases and other marketing materials from time to time during the term of this
Agreement. Additional press releases or publicity materials shall be approved by
each party in writing prior to release.

17.  Warrant. On the Effective Date, the Company shall issue the Warrant to
     -------
MBE, upon the terms and subject to the conditions set forth therein.

18.  Miscellaneous.
     -------------

     (a) Amendments and Waivers. Any term of this Agreement may be amended or
         ----------------------
waived only with the written consent of the parties or their respective
successors and assigns. Any amendment or waiver effected in accordance with this
Section 18(a) shall be binding upon the parties and their respective successors
and assigns.

     (b) Assignment. Each party shall have the right to assign its rights,
         ----------
obligations and privileges hereunder to an assignee in connection with any
merger, acquisition or sale of all or substantially all of the business to which
this Agreement relates. Each MBE Center shall have the right to assign its
rights and obligations and privileges under a Subscription Agreement in
connection with any merger, acquisition or sale of all or substantially all of
such MBE Center's assets. The terms and conditions of this Agreement shall inure
to the benefit of and be binding upon the respective permitted successors and
assigns of the parties. Nothing in this Agreement, express or implied, is
intended to confer upon any party other than the parties hereto or their
respective successors and assigns any rights, remedies, obligations, or
liabilities under or by reason of this Agreement, except as expressly provided
in this Agreement.

     (c) Entire Agreement. This Agreement is the product of both of the parties
         ----------------
hereto, and constitutes the entire agreement between such parties pertaining to
the subject matter hereof, and merges all prior negotiations and drafts of the
parties with regard to the transactions contemplated herein. Any and all other
written or oral agreements existing between the parties hereto regarding such
transactions are expressly canceled.

     (d) Independent Contractor. Neither party shall, for any purpose, be deemed
         ----------------------
to be an agent of the other party and the relationship between the parties shall
only be that of independent contractors. Neither party shall have any right or
authority to assume or create any obligations or to make any representations or
warranties on behalf of any other party, whether express or implied, or to bind
the other party in any respect whatsoever.

                                      -19-
<PAGE>

     (e) Force Majeure. In the event that either party is prevented from
         -------------
performing or is unable to perform any of its obligations under this Agreement
(other than a payment obligation) due to any Act of God, fire, casualty, flood,
earthquake, war, strike, lockout, epidemic, destruction of production
facilities, riot, insurrection, material unavailability, or any other cause
beyond the reasonable control of the party invoking this section, and if such
party shall have used its best efforts to mitigate its effects, such party shall
give prompt written notice to the other party, its performance shall be excused,
and the time for the performance shall be extended for the period of delay or
inability to perform due to such occurrences. If a force majeure event causes
the Company to allocate limited resources among all of its customers, [***]*.
                                                                       ---
The Company shall resume operation of the Service as soon as reasonably
practicable upon conclusion of any force majeure event. Notwithstanding the
foregoing, if such party is not able to perform within sixty (60) days after the
event giving rise to the excuse of force majeure, the other party may terminate
the Agreement.

     (f) Governing Law. This Agreement and all acts and transactions pursuant
         -------------
hereto and the rights and obligations of the parties hereto shall be governed,
construed and interpreted in accordance with the laws of the State of
California, without giving effect to principles of conflicts of law.

     (g) Severability. If one or more provisions of this Agreement are held to
         ------------
be unenforceable under applicable law, the parties agree to renegotiate such
provision in good faith, in order to maintain the economic position enjoyed by
each party as close as possible to that under the provision rendered
unenforceable. In the event that the parties cannot reach a mutually agreeable
and enforceable replacement for such provision, then (i) such provision shall be
excluded from this Agreement, (ii) the balance of the Agreement shall be
interpreted as if such provision were so excluded and (iii) the balance of the
Agreement shall be enforceable in accordance with its terms.

     (h) Waiver. The waiver of any particular breach or default or any delay in
         ------
exercising any rights shall not constitute a waiver of any subsequent breach or
default.

     (i) Notices. Any notice required or permitted by this Agreement shall be in
         -------
writing and shall be deemed sufficient upon receipt, when delivered personally
or by courier, overnight delivery service or confirmed facsimile, or forty-eight
(48) hours after being deposited in the regular mail as certified or registered
mail (airmail if sent internationally) with postage prepaid, if such notice is
addressed to the party to be notified at such party's address or facsimile
number as set forth below, or as subsequently modified by written notice.

----------
     *  Confidential treatment has been requested for the bracketed portion. The
confidential redacted portion has been omitted and filed separately with the
Securities and Exchange Commission.

                                      -20-
<PAGE>

     If to the Company:                       iShip.com, Inc.
                                              2515 - 140th Ave. NE
                                              Suite E-110
                                              Attn: President
                                              Bellevue, WA 98005
                                              Facsimile Number: 425/602-5025

     With a Copy To:                          Craig E. Sherman
                                              Venture Law Group
                                              4750 Carillon Point
                                              Kirkland, WA 98033
                                              Facsimile Number: 425/739-8750

     If to MBE:                               Mail Boxes Etc. USA, Inc.
                                              6060 Cornerstone Court West
                                              San Diego, CA 92121
                                              Attn: Thomas K. Herskowitz
                                              Facsimile Number: 619/546-7499

     (j) Headings. The headings of the several sections of this Agreement are
         --------
intended for convenience of reference only and are not intended to be a part of
or to affect the meaning or interpretation of this Agreement.

     (k) Counterparts. This Agreement may be executed in counterparts, each of
         ------------
which shall be deemed an original and all of which together shall constitute one
instrument.

     (l) Advice of Legal Counsel. Each party acknowledges and represents that,
         -----------------------
in executing this Agreement, it has had the opportunity to seek advice as to its
legal rights from legal counsel and that the person signing on its behalf has
read and understood all of the terms and provisions of this Agreement. This
Agreement shall not be construed against any party by reason of the drafting or
preparation thereof.

     (m) Arbitration.
         -----------

               (i)   Every claim or dispute arising out of or relating to the
         negotiation, performance or non-performance of this Agreement shall be
         determined by arbitration in accordance with the Commercial Arbitration
         Rules of the American Arbitration Association ("AAA"), or as otherwise
         agreed by the parties. The place of arbitration shall be San Diego,
         California.

               (ii)  In the event of any such claim or dispute, the parties
         shall first attempt to resolve the matter through good faith, informal
         negotiations, including non-binding mediation. In the event that the
         parties are unable to resolve the dispute, either party hereto may
         demand arbitration by written notice to the other party and to the AAA
         in San Diego. The parties shall mutually agree on one arbitrator. If
         the parties cannot so agree, the single arbitrator shall be selected by
         the AAA. The costs of arbitration are to be shared equally by the
         parties. Each party shall be responsible for its own costs and
         attorneys' fees.

                                      -21-
<PAGE>

               (iii) The arbitrator shall not have any power to alter, modify
         or change any of the terms of this Agreement or to grant any remedy
         which is either inconsistent with or prohibited by the terms of this
         Agreement, or not available in a court of law. The arbitrator shall not
         have the authority to commit errors of law or errors of legal
         reasoning. In addition, the arbitrator shall have no power or authority
         to award punitive, consequential or incidental damages.

               (iv)  The arbitrator shall, within thirty (30) days after the
         matter has finally been submitted to him or her, render a written
         decision making specific findings of fact and setting forth the reasons
         for the decision which shall be consistent with the terms of this
         Agreement. The parties intend that this agreement to arbitrate be
         valid, binding, enforceable, and irrevocable. The terms of this Section
         shall survive the termination or expiration of this Agreement.
         Judgement on any award of the arbitrator shall be binding and may be
         entered in any court having jurisdiction thereof.

                            [Signature page follows]

                                      -22-
<PAGE>

         The parties have executed this Agreement as of the date first set forth
above.
<TABLE>
<CAPTION>
<S>                                              <C>
COMPANY:                                         LICENSEE:

ISHIP.COM, INC.                                  MAILBOXES ETC. USA, INC.

/s/ Stephen M. Teglovic                          /s/ Charles Lynn Lowder
---------------------------------------          ----------------------------------------
(Signature)                                      (Signature)

Stephen M. Teglovic                              Charles Lynn Lowder
---------------------------------------          ----------------------------------------
(Print Name)                                     (Print Name)

CEO/Pres                                         Executive Vice President/General Counsel
---------------------------------------          ----------------------------------------
(Title)                                          (Title)
</TABLE>

                   SIGNATURE PAGE TO MANIFEST SYSTEM LICENSE
                           AND CO-BRANDING AGREEMENT
<PAGE>

                                    EXHIBIT A

                                 FORM OF WARRANT
<PAGE>

                                    EXHIBIT B

AUTHORIZED EQUIPMENT:
---------------------

     A PC reasonably adequate to access and use the Service for manifesting and
shipping packages, with the following minimum specifications:

     .    a reasonably adequate scale and a label printer
     .    An internet/network connection of at least 256k bits/sec
     .    Processor: P5-233
     .    Ports: 2 Com ports, 1 Parallel port
     .    RM: 64 Megs
     .    HDD: 1.2 GB
     .    Video. 4 MB
     .    OS: Win 98/OSR2
     .    Browser: IE 5 SP1
<PAGE>

                                    EXHIBIT C
                               POTENTIAL CUSTOMERS

<TABLE>
<CAPTION>
=======================================================================================================================
                            TYPE                             DEFINITION
----------------------------------------------------------------------------------------------------------------------
<S>                                                         <C>
                             I                               A customer  physically present in the retail store-front
                                                             or  remote  off-site  locations  of  MBE  Centers  for a
                     In-Center Customer                      transaction in  which they do not  utilize an LMS or
                                                             MBEX (as such terms are defined below).
----------------------------------------------------------------------------------------------------------------------
                                                             A  customer  utilizing  a  self-service  lobby  manifest
                            II                               system  in  a  MBE  Center  ("LMS")  or  a  self-service
                                                                                           ---
               Remote Self-Service Customer                  MBE-branded   remote  manifest  system  ("MBEX")  for  a
                                                                                                       ----
                                                             transaction.
----------------------------------------------------------------------------------------------------------------------
                                                             A  customer  shipping  a  PLD-compliant  and  ramp-ready
                         III A                               package* through a MBE Center that is manifested
                  MBE Internet Customer                      through the MBE Sites.
----------------------------------------------------------------------------------------------------------------------
                                                             A  customer  shipping  a  PLD-compliant  and  ramp-ready
                         III B                               package through a MBE Center, which package is
              Company Internet Customer                      manifested through the Company site.
----------------------------------------------------------------------------------------------------------------------
                                                             A  customer  shipping  a  PLD-compliant  and  ramp-ready
                                                             package   through  a  MBE  Center,   which   package  is
                         III C (1)                           manifested  through  the  Internet  web  site of a third
                 Third Party/MBE Customer                    party that is con-branded or otherwise  affiliated  with
                                                             MBE.
----------------------------------------------------------------------------------------------------------------------
                                                             A  customer  shipping  a  PLD-compliant  and  ramp-ready
                                                             package   through  a  MBE  Center,   which   package  is
                         III C (2)                           manifested  through  the  Internet  web  site of a third
               Third Party/Company Customer                  party that is  co-branded or otherwise  affiliated  with
                                                             the Company or the Service.
----------------------------------------------------------------------------------------------------------------------
                                                             A  customer  shipping  a  PLD-compliant  and  ramp-ready
                                                             package   through  a  MBE  Center,   which   package  is
                         III C (3)                           manifested  through an  Internet  web site  operated  by
                       eBay Customer                         eBay  Incorporated  or in connection  with an auction or
                                                             sale conducted on such web site.
----------------------------------------------------------------------------------------------------------------------
                            IV                               A  customer  that   utilizes  the  Service   and/or  the
                     Company Customer                        Company's   products   and   services   other   than  in
                                                             connection with a MBE Center.
----------------------------------------------------------------------------------------------------------------------
</TABLE>

----------
*  "PLD-compliant and ramp-ready" shall mean compliance with the electronic
   data requirements of each carrier supported by the Service.
<PAGE>

                                    EXHIBIT D

                              SYSTEM SPECIFICATIONS

     The Service will enable MBE and MBE Centers to process packages for
domestic shipment, weigh these packages, and create shipping labels. The Service
will export data to a given MBE Center's Point-of-Sale (POS) station, and will
support ARS/BIN packages, consignee billing, freight insurance, MBE proprietary
or designated transit declared value, and customer address book access. All
carrier rating information will be maintained by the Company from its central
database management system (DBMS). MBE Centers will be allowed to create or
modify their own mark-ups for shipping, and, at its expense, the Company will
update and/or adjust its pricing information for each MBE Center for each
carrier to reflect such modifications. This Exhibit D may be modified from time
to time by mutual agreement of the parties.

     The maximum amount of information downloaded from the Company's server
to the counter manifest station will be 15 kilobytes or less per package
processed.

     The following carriers and services will be supported:

UPS
---

Domestic:
--------
         Ground
         Three Day Select
         Second Day Air
         Second Day Air AM,
         Next Day Air Saver
         Next Day Air
         Next Day Air Early AM

International:
-------------
         Canada Standard
         Worldwide Expedited
           (including Canada/Mexico as set forth in the Specifications)
         Worldwide Express
           (including Canada/Mexico as set forth in the Specifications)

FedEx
-----

Domestic:
--------
         Express Saver
         2 Day
         Standard Overnight
         Priority Overnight
         First Overnight

International:
-------------
         International Economy
         International Priority
<PAGE>

USPS
----

Domestic:
--------
         Parcel Post
         Priority Mail
         Express Mail
         First Class

International:
-------------
         Parcel Post Air
         Parcel Post Surface
         Small Parcel Air
         Small Parcel Surface
         Express Mail
         Global Priority Mail

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

     The Service will include the following features, the more detailed
functionality of which will be agreed to from time to time by the parties as the
Service is developed:

1.       Table of Contents
2.       Table of Illustrations
3.       Introduction
3.1.     Purpose
3.2.     Scope
3.3.     Introduction
4.       Implementation
4.1      Organization
4.1.1.   Opening the Counter Manifest System
4.1.2.   Main Screen Organization
4.1.3.   Menu Structure
4.2.     General Functionality
4.2.1.   Keyboard & Mouse Behavior
4.2.2.   Sortable List Boxes
4.2.3.   Find Package/Transaction Dialogs
4.2.4.   Find Manifest Dialogs
4.2.5.   Find Dialog Search Behavior
4.3.     Process Menu
4.3.1.   Process Package
4.3.2.   Find Package
4.3.3.   Find Customer
4.3.4.   Customer Address Dialog
4.3.5.   Recipient Address Dialog
<PAGE>

4.3.6.   Address Book Dialog
4.3.7.   City/State/Postal Verification Dialog
4.3.8.   Region Locator Dialog
4.3.9.   Transaction Complete Dialog
4.3.10.  Point of Sale (POS) Export Records
4.3.11.  Enter ARS/BIN Package
4.3.12.  Process Consignee Billed
4.3.13.  Freight Insurance
4.3.14.  Reprint Last label
4.3.15.  Reprint label
4.3.16.  Edit Transaction
4.3.17.  Void Transaction
4.3.18.  Recall Voided Transaction
4.4.     Estimate
4.4.1.   Price a Package
4.4.2.   Create Estimate
4.4.3.   Edit Estimate
4.4.4.   Delete Estimate
4.5.     Manifest
4.5.1.   Perform End of Day
4.5.2.   Track a Package
4.5.3.   View Manifests
4.5.4.   View Transaction
4.5.5.   Reprint Manifest
4.6.     Reports
4.6.1.   Manifest Reports
4.6.2.   Rate Reports
4.6.3.   Management Reports
4.7.     Administration
4.7.1.   Preferences
4.7.2.   Center Information
4.7.3.   Taxable Items
4.7.4.   Scales and Printers
4.7.5.   Modify Rates Dialog
4.7.6.   Modify Rates for Zone Based Services
4.7.7.   Modify Rates for Weight Based/Single Zone Services
4.7.8.   Modify FedEx Service Option Rates Dialog
4.7.9.   Modify UPS Service Option Rates Dialog
4.7.10.  Modify USPS Service Option Rates Dialog
4.7.11.  Copy Rates
4.7.12.  Alternate Insurance Rates
4.8.     About
4.8.1.   Rate Effective Dates
4.8.2.   Version
5.       Services and Services Options
5.1.     Services
<PAGE>

5.1.1.   UPS
5.1.2.   FedEx
5.1.3.   USPS
5.2      Service Options
5.2.1.   Declared Value
5.2.2.   Delivery Notification
5.2.3.   Proof of Delivery
5.2.4.   COD
5.2.5.   Call Tag
5.2.6.   Earliest Delivery Time
5.2.7.   Deliver Without Signature
5.2.8.   Certified Mail<PAGE>

                                                                   Exhibit 10.48

                               AMENDMENT NO. 1 TO
                               ------------------
               MANIFEST SYSTEM SERVICES AND CO-BRANDING AGREEMENT
               --------------------------------------------------

     This Amendment No. 1 ("Amendment No. 1") dated as of March 7, 2000 (the
                            ---------------
"Amendment Date"), is made to the Manifest Services and Co-Branding Agreement
---------------
(the "Agreement") dated as of April 27, 1999 between iShip.com, Inc., a
      ---------
Washington corporation (the "Company") and Mail Boxes Etc. USA, Inc., a
                             -------
California corporation ("MBE").
                         ---

     Terms used herein and not otherwise defined shall have the meaning
originally ascribed to them in the Agreement.

                                   BACKGROUND

     WHEREAS, pursuant to a merger of a wholly owned subsidiary of Stamps.com
Inc., a Delaware corporation ("Stamps.com") with and into the Company on March
                               ----------
7, 2000, the Company was acquired by Stamps.com and is now a wholly owned
subsidiary of Stamps.com (the "Acquisition");
                               -----------

     WHEREAS, under the terms of the Agreement, the Company provides MBE and MBE
Centers with an Internet-based shipping system service for use in manifesting
and shipping customer packages, all subject to the terms and conditions of the
Agreement;

     WHEREAS, the Agreement provides for payment of a fee at a per package rate;

     WHEREAS, the Agreement contains exclusivity provisions pursuant to which
the Company will not enter into any agreement to provide services through non-
carrier retail shipping locations with any party other than MBE, provided that
the Company has the right to terminate the exclusivity provisions if MBE and the
MBE Centers fail to meet certain targets for volume of packages shipped using
the services provided by the Company or if MBE ceases to own a certain number of
shares of Stamps.com common stock;

     WHEREAS, in connection with the services under the Agreement, the Company
issued to MBE a warrant to purchase shares of Series B Preferred Stock of the
Company (the "Warrant");
              -------

     WHEREAS, the parties desire to modify the fee and exclusivity arrangements
in the Agreement and the terms of the Warrant (as attached hereto as Exhibit A)
                                                                     ---------
to reduce uncertainty in their respective rights and obligations under the
existing terms of the Agreement and the Warrant; and

     WHEREAS, Section 18(a) of the Agreement provides that the parties may amend
the Agreement by written consent.

     NOW, THEREFORE, in consideration of the mutual promises set forth below,
the parties agree as follows:
<PAGE>

     1.  AMENDMENT TO THE AGREEMENT

         a.  Section 3(d)(iii) of the Agreement is hereby amended and restated
in its entirety to read as follows:

               "(iii)  The Company may, at its option, terminate the exclusivity
         provisions set forth in this Section 3(d) upon the occurrence of any of
         the following events: (A) if MBE and all MBE Centers together fail to
         ship at least [***]* packages manifested by the Service in any period
                        ---
         of three (3) full months, with measurement commencing on January 1,
         2001 (other than any such failure which is directly caused by an event
         of force majeure (as set forth in Section 18(e)) or by the failure of
         the Service to operate in accordance with the Specifications or by the
         Company's breach of any of its obligations hereunder); or (B) MBE
         ceases to own at least 490,000 shares of common stock of Stamps.com,
         including shares that MBE has the right to acquire under the Warrant
         (all as adjusted for any stock split, stock dividend, recapitalization
         or similar transaction). For purposes of this Section 3(d)(iii), MBE
         shall be deemed to own Stamps.com shares pledged as collateral to
         secure bank loans to MBE or to MBE's corporate parent. Stamps.com
         understands that all such shares and the Warrant are currently so
         pledged."

          b.  Section 8(a) of the Agreement is hereby amended by redesignating
the existing text (following the heading "Basic Fee") as subsection (i) and by
adding the following text to the end of the existing text:

          "Through December 31, 2000, the Company shall deem the payment by MBE
          of the "Service Fee" (as defined in subsection (ii) below) to be made
          in satisfaction of, and in substitution for, the Basic Fee, and the
          Company agrees that it shall not be entitled to receive (and shall not
          seek to collect) the Basic Fee during the "Service Fee Period" (as
          defined in subsection (ii) below), as and to the extent the Service
          Fee is paid."

          c.  A new subsection (ii) shall be added to Section 8(a) of the
Agreement, to read in its entirety as follows:

               "(ii)  In consideration for the Service provided hereunder and
          the other obligations of the Company hereunder, the Company shall be
          entitled to receive from MBE a fixed monthly service fee of $500,000
          (the "Service Fee") for the period of time commencing on the Amendment
          Date and ending on December 31, 2000 (the "Service Fee Period").  Such
          Service Fee will be due and payable without regard to the volume of
          packages shipped utilizing the Service and is in satisfaction of, and
          in substitution for, the Basic Fee during the Service Fee Period.
          Payment of the Service Fee shall be due and payable on or before the
          20th day of each month during the Service Fee Period (i.e., March 20,
          April 20, etc.).  MBE's obligations under this subsection (ii) shall
          be secured by the
----------------------------
     * Confidential treatment is requested for the bracketed portion. The
confidential redacted portion has been omitted and filed separately with the
Securities and Exchange Commission.

                                       2
<PAGE>

          Warrant, and, in the event that after any exercise of the Warrant the
          value of the unexercised portion of the Warrant ("Warrant Value") is
          less than the then-remaining unpaid balance of the [***]* aggregate
                                                              ---
          Service Fees payable over the course of the Service Fee Period, then
          MBE shall prepay that portion of the then-unpaid balance of such
          Service Fee by an amount sufficient to reduce such then-unpaid balance
          to an amount that is equal to or less than the Warrant Value."

          d.  Section 17 of the Agreement is hereby amended and restated in full
as follows:

               "17.  Warrant.  On the Effective Date, the Company shall issue
                     -------
          the Warrant to MBE, upon the terms and subject to the conditions set
          forth therein.  On the Amendment Date, the Warrant (which was assumed
          by Stamps.com in connection with the closing of the Acquisition) shall
          be amended and restated in the form attached to Amendment No. 1 of the
          Agreement as Exhibit A."

          e.  Notices under Section 18(i) of the Agreement should be sent to the
Company c/o Stamps.com Inc., 3420 Ocean Park Boulevard, Suite 1040, Santa
Monica, California, Attn: President (w/copy to Corporate Secretary), Facsimile
Number: 310/314-8523. Copies of notices should no longer be sent to Craig E.
Sherman at Venture Law Group.

     2.  EFFECT ON THE AGREEMENT

     Except as specifically amended above, the Agreement shall remain in full
force and effect and is hereby ratified and confirmed.

     3.  COUNTERPARTS

     This Amendment No. 1 may be executed in one or more counterparts, and by
the different parties hereto in separate counterparts, each of which when
executed shall be deemed to be an original but all of which taken together shall
constitute one and the same instrument.

                    [REMAINDER OF PAGE INTENTIONALLY BLANK]

----------------------------
     * Confidential treatment is requested for the bracketed portion. The
confidential redacted portion has been omitted and filed separately with the
Securities and Exchange Commission.

                                       3
<PAGE>

IN WITNESS WHEREOF, each party hereto has executed, or caused its duly
     authorized officer to execute, this Amendment No. 1 as of the date first
     written above.

ISHIP.COM, INC.                              MAILBOXES ETC. USA, INC.

By:    /s/ John M. Payne                     By:    /s/ Thomas K. Herskowitz
    ------------------------------               -------------------------------
Name:  John M. Payne                         Name:  Thomas K. Herskowitz
      ----------------------------                 -----------------------------
Title: CEO                                   Title: EVP
       ---------------------------                  ----------------------------

                                       4
<PAGE>

                                   EXHIBIT A

                                    WARRANT

                                       5

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