Helmut Schneider: [ Charset ISO-8859-1 converted... ] > Hi, > > I'm running postfix as a relay connected via VPN. If the VPN is down > mails are rejected: > > relay=none, delay=0.09, delays=0.06/0.02/0.01/0, dsn=5.4.4, > status=bounced (Host or domain name not found. Name service error for > name=EXCHANGE01 type=AAAA: Host not found)
It's status=bounced (dsn=5.4.4) because Postfix received a DNS NXDOMAIN (name does not exist) response for the name 'EXCHANGE01'. > Is there a way to change the dsn to 4xx and deliver it when the VPN is > up again? http://www.postfix.org/postconf.5.html#default_delivery_status_filter Look under the examples for smtp_delivery_status_filter. Here is an untested variant that should work. /etc/postfix/main.cf: smtp_delivery_status_filter = pcre:/etc/postfix/smtp_dsn_filter /etc/postfix/smtp_dsn_filter: /^5(\.\d+\.\d+ Name service error for name=EXCHANGE01/ 4$1 You can't use http://www.postfix.org/postconf.5.html#smtp_dns_reply_filter because that feature requires that the server returns a reply, not NXDOMAIN. Wietse
