Previously, I reported on how much spam I receive - it came out to about 2,250 spam a day (or about 97% of my total e-mail). While the number of "good" e-mails has gone up to about 4%, the number of spams has gone up as well. Looking at my stats from the last 30 hours, I have the following:

3434 messages processed
128 (4%) good
3289 (96%) spam
17 (0%) unsure - though they were all spam...so we're at 96/4 spam to ham ratio.

Out of the 3289 spams, 1 was a good e-mail. So the false positive rate is 0.03% - pretty good - and as such, I'd highly recommend SpamBayes - I use the Outlook plugin and it works wonders. But this is just one more reason I would love to test Google's GMail. Assuming a large userbase and some way to mark e-mails as spam, you could build a distributed spam filter that could best the one of Cloudmark (which was a great filter until they started charging). For some reason, I thought my number of spams had gone up considerably, but it seems to be increasing slightly. I've gone from ~2250 spams a day to ~2450 spams a day. Still pretty outrageous, but controllable...

URL: The Spamhaus Project