echo "delete from rcpts where mail_id IN (select mail_id from messages where date_day<DATE_SUB(NOW(), INTERVAL $RETENTION DAY));" | mysql $DB
echo "delete from message_body where mail_id IN (select mail_id from messages where date_day<DATE_SUB(NOW(), INTERVAL $RETENTION DAY));" | mysql $DB
echo "delete from message_headers where mail_id IN (select mail_id from messages where date_day<DATE_SUB(NOW(), INTERVAL $RETENTION DAY));" | mysql $DB
echo "delete from messages where date_day<DATE_SUB(NOW(), INTERVAL $RETENTION DAY);" | mysql $DB