>>> # >>> # Initialize. >>> # >>> #! ../bin/postmap smtpd_check_access >>> #msg_verbose 1 >>> smtpd_delay_reject 0 OK >>> mynetworks 127.0.0.0/8,168.100.3.0/28 OK >>> # >>> # MX backup >>> # >>> mydestination wzv.porcupine.org,localhost.porcupine.org OK >>> inet_interfaces 168.100.3.7,127.0.0.1 OK >>> recipient_restrictions permit_mx_backup,reject OK >>> rcpt wietse@wzv.porcupine.org ./smtpd_check: warning: support for restriction "permit_mx_backup" will be removed from Postfix; instead, use "relay_domains" OK >>> rcpt wietse@backup.porcupine.org OK >>> rcpt wietse@porcupine.org ./smtpd_check: : reject: RCPT from localhost[127.0.0.1]: 554 5.7.1 : Recipient address rejected: Access denied; to= proto=SMTP 554 5.7.1 : Recipient address rejected: Access denied >>> permit_mx_backup_networks 168.100.3.5 OK >>> rcpt wietse@backup.porcupine.org ./smtpd_check: : reject: RCPT from localhost[127.0.0.1]: 554 5.7.1 : Recipient address rejected: Access denied; to= proto=SMTP 554 5.7.1 : Recipient address rejected: Access denied >>> permit_mx_backup_networks 168.100.3.4 OK >>> rcpt wietse@backup.porcupine.org OK