>> your solution for backscatter is a good one. but >> how does it do against non backscatter? this >> is also a significant problem. generally >100 >> messages per day for me. > > content-based filtering works fine for me.
how do you maintain content-based filtering without spending time on it on a regular basis? at work we have a barracuda box which seems to be completely content based. it's false positive rate is significant. so you actually need to skim up to a hundred questionable messages per week. i find that skimming through lists like this is very error prone. - erik
