4 >>> #! ../bin/postmap smtpd_check_access
6 >>> smtpd_delay_reject 0
8 >>> mynetworks 127.0.0.0/8,168.100.189.0/28
13 >>> mydestination wzv.porcupine.org,localhost.porcupine.org
15 >>> inet_interfaces 168.100.189.7,127.0.0.1
17 >>> recipient_restrictions permit_mx_backup,reject
19 >>> rcpt wietse@wzv.porcupine.org
21 >>> rcpt wietse@fist.porcupine.org
23 >>> rcpt wietse@porcupine.org
24 ./smtpd_check: <queue id>: reject: RCPT from localhost[127.0.0.1]: 554 5.7.1 <wietse@porcupine.org>: Recipient address rejected: Access denied; to=<wietse@porcupine.org> proto=SMTP
25 554 5.7.1 <wietse@porcupine.org>: Recipient address rejected: Access denied
26 >>> permit_mx_backup_networks 168.100.189.5
28 >>> rcpt wietse@fist.porcupine.org
29 ./smtpd_check: <queue id>: reject: RCPT from localhost[127.0.0.1]: 554 5.7.1 <wietse@fist.porcupine.org>: Recipient address rejected: Access denied; to=<wietse@fist.porcupine.org> proto=SMTP
30 554 5.7.1 <wietse@fist.porcupine.org>: Recipient address rejected: Access denied
31 >>> permit_mx_backup_networks 168.100.189.4
33 >>> rcpt wietse@fist.porcupine.org