ELECTRONIC MAIL SYSTEM

PROBLEM TO BE SOLVED: To prevent the presence of a local address from being known to the outside in transmitting electronic mail to the outside. SOLUTION: A local address deletion means refers to the envelope and header of notified electronic mail, and decides whether a local domain and a domain section developed on a memory are the same for all destinations (S901). When the local domain and the destination of the same domain are present, all destinations (local addresses) are deleted from the envelope and header of the electronic mail. Then, after the local address is deleted from the envelope and header of the electronic mail, or when the destination of the same domain as the local domain is not present, the transmission of the electronic mail is requested to an SMTP service. The electronic mail whose transmission has been requested to the SMTP service is transmitted to the SMTP server, and transmitted from the STMP server to the outside. COPYRIGHT: (C)2009,JPO&INPIT