Currently, the USPS has not authorized the use of credit cards nor has it set a date for their acceptance. The initial version of E-Stamp Corporation s desktop software will work with Windows. A follow-up under consideration may work with Macs. If you experience a misprint or printer malfunction during beta testing, an e-mail address is provided to send a request for a refund. Only U.S. domestic mail will be available initially.
Plans are underway for international stamping.
You cannot process bulk mail using the E-Stamp. You cannot print a sheet of stamps for later use because each electronic stamp you print is unique, as it contains machine-readable information specific to the sender and recipient to whom the mail is addressed. Web site offers. You can click on Real Results at their home page and read comments from satisfied beta testers such as Steve Williams of American Yankee Association, a non-profit association of Grumman American Aircraft Owners Worldwide, who comments, I get many submissions of photos and articles by mail and I need to send them back. The weight is always different especially when you factor in parcels containing heavy aircraft parts.