| 摘要 |
<p>An e-mail server device which has a nuisance mail reception preventing function by an improved white list system and has a mail address leakage preventing function which reliably prevents a mail address from being leaked. The e-mail server device has: a received mail filter means (13) which performs judgment of discarding and that of delivery according to the destination mail address and one or more of the mail addresses of the transmission source, the return destination and the reception destination regarding a received e-mail, and delivers the received e-mail which is not discarded and whose delivery is permitted; and a transmission mail filter means (18) which performs processing of replacing a character string expressing an address which is a mail address in a transmission e-mail and does not coincide with the destination mail address with a character string expressing a mail address which can be disclosed to the communication opposite party having the destination mail address from the providing destination account of a mail address expressed by it, or processing of erasing the non-coincident character string.</p> |
