spamassassin's sa-learn

[M.W. Chang]

It seems that mozilla's built-in bayesian filter works better than
SpamAssassin. Until now, SA failed to identify many Chinese spam while
mozilla can correctly move them into the Junk folder on reception.

> It's not *really* Bayesian - I don't think any of them are. They all ignore the
> cross-correlation. That is, they don't correct for the fact that enlarge and
> p...s frequently occur together, and sum the probabilities. To do it right
> is hard.
> 
> I used to run a "Bayesian" filter at work, until they disabled Unix e-mail
> at the end of October, and it worked fairly well.

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