> I don't know how to debug this strange behavior as it appears randomly. > I set $log_level = 5; for several hour and didn't see any "Hits: -,". > I switched back to $log_level = 0, waited a bit and some "Hits: -," appears again.
Check if this is happening for specific email or every email. If this is happening with all the emails then it is obvious Spamassassin is disabled. Make sure that following line is commented out in amavisd.conf @bypass_spam_checks_maps = (1);
