> > weighting and heurisitics are mostly content-scanning systems, they use > > the envelope information + the entire message body to evaluate. So > > you must receive the entire message for them to be effective. > > In Declude (for Imail) I can set it so if a message fails bl.spamcop.net it > would get a score/weight of 5 then continue testing other rbls and such. if > all the tests have a certian score it will brutally delete the message. > > Your saying that IMGate and Postfix does not have this ability? A third > party program would be required such as the Spam Assassin or Message Sniffer?
SpamAssassin is a filter program intended for use with servers. One of the most common ways to link it to Postfix is to use amavis-new. A MAil VIrus Scanner, amavis, has many flavors and branches. The -new line and -ng are the most active. Of those two, amavis-new is the preferred. Postfix can pass mail through an external filter. Use amavis-new as this filter. Then amavis-new can run the email through SpamAssassin, and other content filters such as an anti virus program. Based of the weighting these assorted programs give, the mail can be accepted, rejected, whatever. So SpamAssassin does not replace Postfix, it works with it. Use the Postfix smtpd_*_restrictions to kill the obvious stuff, and the others to clean up the rest. --Eric
