Have some annoying SPAM that consistently shows a negative score on BAYES.
Is the default scoring or influenced by BAYES in some way?
*-1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1%
* [score: 0.0000]
The score is reasonable for guaranteed ham, which is what your Bayes thinks
this spam email is
Of course the score isn't reasonable for spam, but Bayes thinks it is ham.
In addition to being cautious of autolearn as Benny descriped, yes, you need
to retrain your Bayes, because it is very clearly confused on this point.
Loren