> BAYES_50 should always be zeroed out.  BAYES_50 means there's a 50% 
> chance of it being spam or ham.

There's an adage that says 'if something has a 50% chance of going
wrong, 9 times out of 10 it will.' That's partly why I adjusted my Bayes
scores in such a way that Bayes_00 scores -5.5, Bayes_50 scores -1 and
Bayes_99 scores a mere 2.5

Most of the spam I receive gets caught by Bayes_99 (but would get caught
by the other rules in any case), but I used to get a lot of false
positives scoring marginally above threshold that had Bayes rated at
50%. And as I prefer users to get a little spam rather than miss an
important email I figured that if Bayes isn't sure I'll err on the side
of caution.

As ever YMMV.

Ralph Pickering
Crown Business Communications Ltd

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