Just for the record, we don't have plans to implement more Bayes filtering in Declude (we did years ago, before the Paul Graham article, and found that it just wasn't as effective as the weighting system).
Yeah, I tested the HERU filters and found them to be remarkably skilled at detecting opt-in advertising and newsletters. I saw your comments on this list about that fact and it being the reason why it didn't make a release. I even thought about using HERU-10 as a negative weight test to detect friendly opt-in ads :)
My only problem with using this DNS-based stuff is that you can only control the score and not the actual content of those databases. MAILPOLICE-PORN has been blocking Ebay for at least a week (figure that one out), SPAMCOP picked up PayPal.com for a short time last week and has even blacklisted Ipswitch as was discussed in this group earlier this year, Macromedia as well. I think they need to adjust their submission filters to account for the spam nazis :)
Technical tests can be very nice as well, though I just found another valid BADHEADERS violator, MDaemon's Web mail client which doesn't use 4 numbers in time offset, unless you live in the middle of the Pacific Ocean...
I just want to use some select content filters to help clean up the gray area. On my box about 5% of the E-mail scores between 5 and 9, and about 80% or more of that is spam. Around 5% also fails between 10-14, and about 97% of that is spam with the false positives being mostly automated stuff from poorly configured servers.
Just rambling...not enough sleep...grumble, grumble...
Matt
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