Amavisd-new

What I've done is set :

$sa_tag_level_deflt  = -999.0
$sa_tag2_level_deflt = 4.9
$sa_kill_level_deflt = 20.0
$final_spam_destiny = D_DISCARD

• So all messages get the spam headers
• All mail scoring >4.9 is flagged as spam but passed on to intended recipient
• All mail scoring >20 is discarded

/etc/amavis/conf.d/15-content_filter_mode
@bypass_spam_checks_maps = ( [“.$mydomain”, 'myhostname.$mydomain' '.somedomaion.org' ] );

$insert_received_line = 0;
modules that amavisd-new uses: ripole
p0f