Electronic mail server with function for preventing reception of spams by improved white list system

摘要

The invention provides an e-mail server, with which e-mails are communicated between a member belonging to the server and a communication mate of the member under the protection of function or performance for preventing SPAMs from being received by an improved white list system and e-mail addresses can be surely prevented from undesirably leaking out. The server comprises received e-mail filtering means for forming destruction judgment and delivery judgment on a received e-mail for causing the received e-mail to be delivered in accordance with a delivery permitting decision and transmission e-mail filtering means for conducting processing on a transmission e-mail by which a group of letters representing an e-mail address discordant with an addressee's e-mail address contained in the transmission e-mail is replaced with another group of letters representing an open e-mail address or eliminated.