spambouncer -- nice procmail spam filter (Score 1)

check out spambouncer at www.spambouncer.org. i've been using it for quite some time now, and it catches most all of my incoming spam. there's some stuff it catches that it shouldn't, but that can be tailored with custom procmail rules and a quick check over the bounce.incoming folder once in awaihle. and it's free and open source, of course.