3D Mailbox: Integrated, User-Friendly SpamBayes Spam Filter
SpamBayes is the best spam filter because it not only intelligently learns what is spam or good mail, but it also has humility: When it's not certain, it classifies mail as "unsure". You can then decide how to classify it. We make classification easy with a simple point and click.
Each mail is scored by SpamBayes from 0 (good mail or "ham") to 100 (absolute spam). These scores are clearly displayed on all the emails you receive...
... which makes setting your personal thresholds (for ham, unsure, and spam) a simple matter of using a slider!