-------------------------------------------------- 100 USER_IN_BLACKLIST From: address is in the user's black-list
100 points. That's an explicit blacklist, not AWL. So the question is, which address is blacklisted?
It says From address, but this could also be the envelope-sender, I think. You should be able to grep around for the values in those two headers and see what you find.
If that isn't helpful, copy the message to a file so you can run it through SA manually with -D. I think that may be explicit enough to tell you the name that it hits on.
Loren