I finally got tired of the massive quantities of "spiced ham" in my inbox so I did a bit of research and came upon this: A Plan for Spam This article describes the algorithm known as Bayesian Filtering, which superficially sounds very similar to regular spam filtering but has subtle differences. While other spam filtering methods use an arbitrary system of "points" to determine whether a piece of mail is spam or not, Bayesian filtering uses probability. [How many "points" is the word "viagra" worth on ths spam scale? It is a meaningless question.] The Bayesian filter, on the other hand, analyzes a collection of regular e-mail messages and a collection of spam, to determine the probability by which a particular word indicates the spaminess of the message it is in. Supposedly this method can achieve up to 99.9% accuracy. I have been using the following program: POPFile since this weekend and have achieved only 85% accuracy so far. That should go up as it recognizes more e-mails. Part of the reason my accuracy rate is so low, I think, is because I deal a lot on Ebay and those legit messages in some ways resemble sales pitches. Interesting statistic: I've had the filter on my machine for only a few days. I have received 24 personal e-mails, containing a total of 1700+ unique words. In that same period, I have received over 200 spams (nearly 10 times as much) but despite the huge volume of mail, the spam messages contain only 1400+ unique words. So the presence of this small number of words in a great number of messages is a pretty good indicator that a message is spam. Anyway I was fascinated by this. With my previous filtering, I was happy to get rid of 50% of my spams. And I got false hits, as well. I once filtered out any message containing 4 or more exclamation points in the subject line. A message like that *must* be spam, right? Well then I asked my dad if he had THE DAY THE EARTH STOOD STILL on DVD yet and if not, to keep an eye on the mail. Anyway his enthusiastic reply came with the subject: "NO!!!!!!!!!!" so into the spam bin it went. LOL. If anyone else has war stories, I'd love to hear them. Or if anyone wants to try POPFile, I'm curious to know what accuracy you can reach. Best wishes.