On Fri, 2008-12-19 at 11:23 -0600, Brad Knowles wrote: > Lindsay Haisley wrote: > > > I note that Brad doesn't mention this solution in his reply to you, so > > it may be frowned upon officially, but I've found it helpful. > > SpamAssassin is one good anti-spam tool, but IMO it should be integrated > into the MTA, because that's the only place where you can make these kinds > of decisions before you actually accept the message. Once you accept a > piece of spam, you've already lost. Even if you throw it away, the spammer > was able to increase their deliverability count.
The problem with this is that no spam detection method is 100% effective, and with SpamAssassin there's some overlap between setting the rejection level low enough to be effective and getting false positive identification of spam. I use RBL filtering from several carefully selected RBL lists to eliminate about 80% of incoming spam "at the front door" (it never makes it onto the system) and the rest gets analyzed by SpamAssassin and identified spam tagged accordingly for subsequent segregation, if the user wants it. The RBL filtering here is probably well in excess of 99.99% accurate in its identification. The SA marking/segregation mechanism isn't in place for Henstridge's integration of SpamAssassin into Mailman, but the global rejection level can be set per list server. This solution isn't perfect, but it does help cut down on complaints from list owners about too much moderator spam. -- Lindsay Haisley | "In an open world, | PGP public key FMP Computer Services | who needs Windows | available at 512-259-1190 | or Gates" | http://pubkeys.fmp.com http://www.fmp.com | | ------------------------------------------------------ Mailman-Users mailing list Mailman-Users@python.org http://mail.python.org/mailman/listinfo/mailman-users Mailman FAQ: http://wiki.list.org/x/AgA3 Searchable Archives: http://www.mail-archive.com/mailman-users%40python.org/ Unsubscribe: http://mail.python.org/mailman/options/mailman-users/archive%40jab.org Security Policy: http://wiki.list.org/x/QIA9
