+-------------+---------------+----------------+----------------------+--------------+--------+ | sender_name | sender_domain | src | mta_fqdn | dest_address | policy | +-------------+---------------+----------------+----------------------+--------------+--------+ | * | * | 32.23.32.2 | * | *@quux.com | 1 | +-------------+---------------+----------------+----------------------+--------------+--------+This rule allows all sending usernames from all domains from IP 32.23.32.2 to send to any user of quux.com.