I've been running the same instance of SpamBayes (1.1a3) for ages, as a proxy, and it's been doing a stellar job. I train this by exception on an ongoing basis, classifying all the Unsures and marking any Ham that rates over 10% as Ham, and on rare occasions marking something that the proxy classified as Ham as Spam. (There have been very few of these to deal with.)

However, about three days ago I started seeing a huge increase (maybe ten times) in the volume of mail marked as Unsure, all of which seemed to be obviously spam to me, along with a dozen or so a day sailing through as Ham, often scored as 0.00%.

I recall that this can happen over time, and I'm pretty sure I've solved it in the past for others by flushing out all their training and starting over, but I can't for the life of me remember how to do that.

The proxy is running on an ancient Fedora Core 5 machine that doesn't have much else to do. I see hammie.db and spambayes.messageinfo.db in /opt/st_data/ and my database backend is set to dbm.

Van

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