[conspire] anti spam

[Rick Moen]

Quoting Adam Cozzette (acozzette at cs.hmc.edu):

> It takes some work to configure, though.

Among other things, you should consider adjusting the threshold levels
to change them from the defaults.

Not _all_ spammers are morons, so a significant number of them test spam
messages against default SA installations, to make sure their spamicity
measures under 5.0, before sending them out.  So, it is greatly in your
interest to modify your SA installation to make sure its heuristics
differ from the defaults.  You might want to add some custom rulesets,
or change the weightings, or lower the maximum spamicity permitted.
And, of course, training the Bayesian classifier definitely helps.  (You
might consider upping the weight given to the Bayesian test.)