Your Stamps.com $80 Offer

FREE 5lb Digital Scale

As a new Stamps.com customer you will receive a FREE 5 lb. Digital Scale. The scale is a $50 value and is yours to keep with no additional obligation. Just pay for shipping and handling (typically $9.99 or less).

$25 Postage Offer

As a new Stamps.com customer you will receive $5 in free postage that you can use during your trial period. After you complete your trial period, you are eligible for an additional $20 in postage. We will give you two $10 postage coupons. You can redeem one coupon per month once you complete your trial. If you stay with Stamps.com past the trial period, you will be charged $15.99 a month for the Stamps.com service, you can cancel your services at any time.

FREE Supplies Kit

To help you get started we will ship you a free Supplies Kit that includes free postage labels to use with the service (a $5 value). However, you don't need to wait for the Supplies Kit to arrive in order to print postage. You can immediately take advantage of features such as printing shipping labels on plain paper or printing postage directly on envelopes!

Stamps.com Unable to Attend ThinkEquity Conference

LOS ANGELES, September 23, 2004 – Stamps.com® (Nasdaq: STMP) announced today that owing to a change of plans it has cancelled its appearance today at the ThinkEquity San Francisco conference. CEO Ken McBride was unable to attend the conference as he was scheduled to be in other meetings for the duration of the week.

Stamps.com also announced today that it is in active discussions with the US Postal Service regarding next steps on the market test of PhotoStamps™. The current market test is expected to end on September 30. Possible outcomes following the current market test include a suspension of the PhotoStamps service while the data from the market test is evaluated, a continuation of the PhotoStamps service while the data from the market test is evaluated, an entirely new market test commencing immediately following the current market test, or a new market test commencing at some future date. Stamps.com expects to announce the next steps for the PhotoStamps service as soon as it is available.

About PhotoStamps

PhotoStamps is a PC Postage product brought to you by Stamps.com Inc., the leading provider of Internet–based postage services. In addition to providing the PhotoStamps product, Stamps.com PC Postage Service enables over 300,000 customers to print U.S. Postal Service–approved postage with just a PC, printer and Internet connection. The Company targets its PC Postage services to small businesses and home offices, and currently has partnerships with companies including Microsoft, CompUSA, EarthLink, HP, NCR, Office Depot, and Vendio.

“Safe Harbor” Statement under the Private Securities Litigation Reform Act of 1995: This release may contain forward–looking statements that involve risks and uncertainties. Important factors, including the Company’s ability to complete its products and obtain regulatory approval, which could cause actual results to differ materially from those in the forward–looking statements, are detailed in filings with the Securities and Exchange Commission made from time to time by Stamps.com, including its Annual Report on Form 10–K for the fiscal year ended December 31, 2003, Quarterly Reports on Form 10–Q, and Current Reports on Form 8–K. Stamps.com undertakes no obligation to release publicly any revisions to any forward–looking statements to reflect events or circumstances after the date hereof or to reflect the occurrence of unanticipated events.

Stamps.com, the Stamps.com logo and PhotoStamps are trademarks or registered trademarks of Stamps.com Inc. All other brands and names are property of their respective owners.