Here's another e-mail that got through SpamAssassin: http://rafb.net/p/cFMnIy61.html
As you can see I've effectively disabled the BAYES_00 rule as it's giving false credit to a ton of backscatter crud messages, but is there really a way to block these kinds of backscatter? Is my Bayesian filtering screwed up? What score does your SA install give for this message?
Best regards, Jeremy Morton (Jez)