※ 引述《[email protected] (天涯明月心)》之铭言： > ※ 引述《[email protected] (我爱 TX)》之铭言： > : 使用者可以自行设定允许接受的来源信件 > : 寄件者的e-mail 不是我的好友，我根本不接受寄来的信，由sendmail 立即挡下 > : 想加入我的好友，需先经过我的认证才行 > : 譬如说寄出一封标题为[请认证]的信件，这种信就可以过关 > : 而这个[请认证]的字样还可以由使用者自行更改，应该够灵活了 > : 有点异想天开，不过应该可行 > : 只是有那种 mail server 已经实作了吗? > http://www.0spam.com/ > 不知道那里有类似的，可以下载来安装。 /usr/ports/mail/tmda Tagged Message Delivery Agent (TMDA) is designed to significantly reduce the amount of spam (junk-mail) you receive. TMDA strives to be more effective, yet less time-consuming than traditional spam filters. The technical countermeasures used by TMDA to thwart spam include: - whitelists: accept mail from known, trusted senders - blacklists: refuse mail from undesired senders - challenge/response: allows unknown senders which aren't on the whitelist or blacklist the chance to confirm that their message is legitimate (non-spam) - tagged addresses: special-purpose e-mail addresses such as time-dependent addresses, or addresses which only accept certain kinds of communication. These increase the transparency of TMDA for unknown senders by allowing them to safely circumvent the challenge/response system. TMDA can also be used as a general purpose local mail delivery agent to filter, sort, deliver and dispose of incoming mail. Author: Jason R. Mastaler WWW: http://tmda.net/ -- ※ Origin: 邪恶小鹿鹿 <Deer.twbbs.org> ◆ From: muse.csie.ntu.edu.tw