Detecting false-positives

[David Carmean]

How do those of you detect false-positives?

Especially those of you with high volumes of individual mail?  

As you can see in this plot, there are periods where I get well 
over 1,000 messages each day, and it really defeats the purpose 
of filtering if I have to check 600-700 messages per day for 
false positives :)

    http://www.halibut.com/~dlc/tmp/1year-bogodata.png