From: "Thom Paine" <painethom@xxxxxxxxx>
I've been noticing that the config I had been using for aboutthe past year is slowly becoming less effective against spam. I'm currently using half a dozen or so bl's along with spam assassin.
SARE is a wonderful rule source. http://www.rulesemporium.com/ is your friend. Go to the "rules" page. Read the description of the rule sets carefully, and select those which meet your needs. If you are REALLY desperate, have a poorly trained BAYES, and have a lot of image spam you MIGHT check out the spamassassin-users list archives for "FuzzyOCR". It is HIGHLY experimental and more than moderately effective at this point. http://www.rulesemporium.com/programs/sa-stats.txt is a good script for assessing the effectiveness of your various rules. A well trained BAYES will leave you with BAYES_99 catching about 60% or more of all spam and 0.04% or so of ham. BAYES_00 will have that pretty much the reverse. If you have that raise the BAYES_99 score until you see it developing false hits or reach a score equal to your threshold. (I use the default of 5 with a LOT of SARE rule sets. I have perhaps a couple spams in a week get trough out of 25000 emails a month. I get virtually no hams get mismarked.) {^_^}
