Локальний BLACKLIST по отправителю
“LIMIT 1” – обязательно.
acl_check_rcpt:
# ...
deny
message = SPAM blocked. Sender is in blacklist
senders = ${lookup mysql{SELECT '$sender_address' \
FROM `blacklist_sender_address` \
WHERE instr('$sender_address',`address`)>0 LIMIT 1} \
Таблицы
CREATE TABLE IF NOT EXISTS `blacklist_sender_address` (
`address` varchar(255) NOT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1;