After talking with OliverScholz, I decided that my SpamStat problem is this: In the list of mail splitting rules, spam-stat comes *before* the BBDB. This means that spam in mailing lists is also supposed to be detected as spam by spam-stat, but all the tokens that make a legal mailing list contribution (mailing list headers, mailing list footer, mailing list server) will fool it. So there’s no good way of improving it. At the same time, *reducing* the number of categories might very well *improve* spam-stat. So I switched the rules around.
BBDB now acts as a whitelist, coming *first*. Only the undecided stuff that would end up in mail.misc and two other (keyword-based) groups are the non-spam groups, now. That means that spam to mailing lists will always come through. Oh well, too bad. I do hope to reduce spam in my mail.misc group, though.
Let’s see how it goes.
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