Jo Rhett <[EMAIL PROTECTED]> writes: > I keep seeing spam messages with negative scores, like this: > > No, score=-0.317 tagged_above=-1.99 required=4.01 > tests=[BAYES_00=-2.599, DNS_FROM_RFC_ABUSE=0.2, DNS_FROM_RFC_POST=1.708, > HTML_30_40=0.374, HTML_MESSAGE=0.001, MIME_HTML_ONLY=0.001, > NO_RECEIVED=-0.001, NO_RELAYS=-0.001] > > So I'm trying to figure out what amavisd is doing with the sa bayes > stuff, but all I can find is a few notes that amavisd-new uses a single > bayes database for all users. Nothing about how to tweak it ...
Take this with a grain of salt, I'm biased (being the bogofilter co-maintainer): IMHO the SpamAssassin Bayes stuff should be disabled -- for various reasons: 1. is that it causes a major performance issue, even on lightly loaded Pentium D and Xeon 2.8 equipped servers, which causes filtering to be aborted through amavis's timeouts (at least for my older amavisd-new version). 2. SA's self-registering stuff should be disabled - Bayes filters need to know what the human that is to receive the messages considers spam, not what a machine second-guesses. 3. centralistic Bayes filtering doesn't work well, as you've just seen in one of the failure modes that are sort of expected for this class of filters 4. per-user databases don't scale too well 5. Bayes requires users to be permanently alert and correct mistakes. I'm not saying that SpamAssassin alone or Bayes are bad, but SpamAssassin's Bayes implementation is, and integrating it with amavisd-new doesn't ameliorate the pain. 3 to 5 are generic issues that affect all trainable/Bayesian filters. -- Matthias Andree ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys -- and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ AMaViS-user mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/amavis-user AMaViS-FAQ:http://www.amavis.org/amavis-faq.php3 AMaViS-HowTos:http://www.amavis.org/howto/
