US Patent 7421580 Method and apparatus for synchronizing e-mail addresses

A method for synchronizing a user's e-mail addresses in two locations and validating the synchronized e-mail address is provided, wherein the two locations can be an authentication proxy and an integrated authorized site of the authentication proxy, or they can be the authentication proxy and a partner site of the authentication proxy. Also disclosed are several methods for maintaining the synchronized status and confirmed status when the user changes his e-mail address from either of the two locations.