A receiver receives e-mails. In the case where an address of an e-mail is a user's e-mail address which is managed by another e-mail server device, a transfer unit transfers the e-mail to the another e-mail server device. In the case where an address of an e-mail is a user's e-mail address which is managed...http://www.google.com.hk/patents/US6985925?utm_source=gb-gplus-share專利 US6985925 - Server device and method for providing e-mail service, and information recording medium recording a program for realizing the service