Gary,

> I see. Oops, for some reason I must have casually assumed that because mail
> is tagged as spam at tag2_level, this alone might be sufficient to short
> circuit delivery of a message to a recipient in @bypass_spam_checks_maps.

Back in versions before amavisd-new-20030314 there was no tag2_level,
all spam handling was triggered at kill level. Due to popular demand,
part of this spam handling associated mainly with header editing/tagging
got its own tag2_level control, although it is still common that
tag2_level is equal to kill_level.

The kill_level is still the main control, scores above kill_level
indicate mail is officially spam (CC_SPAM), spam quarantining,
spam blocking and spam admin notifications take place for spam.
$final_spam_destiny and @spam_lovers_maps are consulted when
deciding whether spam should be blocked or not.

Scores below kill_level indicates mail is not spam. To make it
slightly more flexible, it is possible to start labeling header
(e.g. Subject, X-Spam-Flag) at a lower level than kill_level,
i.e. at tag2_level. Also appending address extensions takes place
at tag2_level. The region between tag2_level and kill_level is
labeled as a CC_SPAMMY contents category. As far as quarantining
and blocking of mail is concerned, such mail is still clean.

> Thus, if kill_level is beyond any possible spam score, the action 
> in $final_destiny never takes place. All spam is delivered.

Yes.

The @bypass_spam_checks_maps is mostly outside of all this story.
It is the first control. It only tells if SpamAssassin should
be called or not. If it isn't called, it is the same as if it were
called but returned a low spam score. That is all there is
to @bypass_spam_checks_maps. Covers your eyes and you'll never
recognize spam in mail.

  Mark

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