I recently noticed that my email server now delivers spam to final recipients even though the spam score is more than the
$sa_kill_level_deflt.

A probable reason is that some amavisd update has introduced new configuration variables, which I have not defined in my configuration, and the default value of some such variable causes this unwanted behavior.

I tried to go through documentation, but did not find the reason. Has anybody else had the same problem?

# amavisd -V
amavisd-new-2.8.0 (20120630)

– Jussi