Hello. I am not a major admin. I have used a Linux box w/ Sendmail + Spamassassin off and on for years, just for personal and small-biz email. I have only two dozen or so accounts allocated among three domains.
Using third-party email service for many years, which supposedly includes Spam filtering, I noticed that gradually, of ~500 or so mails per account per day, about 40% are spam. And in fact I noticed perhaps half again as many spam were getting through as were caught in my email service provider's Spam trap (I have no idea what they use). Decided to take things in hand again. After about 3 months of fiddling I've got it to the point where I'm down to maybe two Spam per account per day getting through. Typical SA Bayes files sizes are about 650K Bayes_seen/AWL and 1.2G Bayes_toks Thing is, in order to get this performance I've had to set the threshold for Spam/Ham at a SA score of 2, after all hand-feeding and tweaking I know to do. I lowered it gradually over time by 0.5 every two weeks or so, to this point. So far I've found maybe 1 or 2 false positives per account per week at this scoring. I'm fine with it as is, but thought some folks here might find it interesting to note. William L. Polhemus, Jr. P.E. Sent from my iPhone 5
