I’ve been getting noticeably less spam since my main work accounts switched over to new domains, but I do still get a fair number of annoying messages daily on my personal accounts. I’ve looked for proxy options to handle IMAP but have been unable for one reason or another to deal with them effectively until I really got involved with SpamSieve.
In the latest release, a Bayesian filter was added which has increases the rate of learning as well as the accuracy. I’ve been waiting to write this actually for about two weeks so I could be sure I was actually happy with the performance and I can say that, I am and that it works very well.
I am currently getting over 96% accuracy with only 2 false negatives. I am using it with some not yet released scripts for Mail.app but I would image that they will be released shortly. All is working fine.