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RE: Anti-Spam Abilities ~Ned Nimfanakonyoopsi 3.Oct.02 12:09 AM a Web browser Domino Server 6.0Windows 2000
I've been running with RBL checking, rules, and a (small) deny connections list for about a month. Until yesterday, I was seeing somewhere between 66% and 75% of spam either rejected by the RBL or deny list, or quarantined by rules, with only a handful of false positives. Rules could still use some additional power, such as the ability to define a global exception list, and the ability to examine the tag fields that RBL checking puts into messages if you don't set the RBL feature to automatically reject messagse. But even without those features, the results have been very encouraging.
Yesterday I added bl.spamcop.net to my list of RBL servers, and now I'm seeing so little spam coming through that I'm a little worried about whether or not I'm getting false positives -- but so far nobody has reported being unable to reach us, so maybe it's just going really, really well. The sample period is too slow to draw conclusions, but it looks like we're getting somewhere between 5% and 10% of the amount of spam we were getting prior to turning on all these features.