Spent 3 or so hours yesterday despamming my mail, with new and harder criterias. Seems my recent bogofilter upgrade didn't go great, and I lost my bayesian filters. So down to the terminal it was and start classifying, and teaching. In the same moment I took the time to wipe all my old virus-laden spam as that is now taken by an antivirus (before spamfilters).
End result after some training, inbox, no message over 0.2 points. Spam, all messages at 0.99+ points. filter on all email (yes, that takes some time), no false positives. No messages at all over 0.5 points. Yep, I was aggressive when setting delimiters. And I took the time to erase some questionable mails. ;)