I figured since I
mentioned that I use a good piece of software to filter out the spam (30,000 in two months, and counting), I might as well mention what that software is. It's called SpamBayes and uses Bayesian filtering to create a working database of words that are common across my spam and across my "good" messages. It takes a while to train it, but for each message you mark as spam and for each message you mark as good, it "learns" for future messages. It's quite a powerful piece of software, and best of all, it's free.
Prior to using SpamBayes, I had used a piece of software by
Cloudmark called Spamnet. Spamnet was very good at filtering out spam, but the false positive rate was too high to be of any use. The way Spamnet worked is when you marked a message as spam, it would communicate with a central server, and if enough people marked it as spam, it would be marked as spam for everyone else. So if enough people marked a newsletter you want to get as spam, you won't see it as it will be automatically filtered to your spam box. I really didn't know of any other options out there, so I used Spamnet for a long time (it was free, after all). But then they started charging for the service and I wasn't about to fork over $3 or $4 a month for software that had free alternatives and had such a high false positive rate.
After Spamnet, I still had not learned about SpamBayes, so I switched to Matador by
Mailfrontier. Mailfrontier, similar to Spamnet, used a central server to mark spam and also uses advanced filters to get rid of spam. In my initial trials, it was a much better filter than Spamnet, but it too did mark some good messages as spam, though the false positive rate was smaller than Spamnet. I really liked this application (had not researched enough about Bayesian filters) and paid the $30 registration. I guess I could transfer that registration code to someone else since I no longer use it, but I wouldn't recommend Matador when there's SpamBayes out there. And thus ends tonight lecture on mail filters.
URL:
SpamBayes Outlook Addin