postfix/error: 1398FA00AC7: to=<firstname.lastname@example.org>, relay=none, delay=0.12, delays=0.1/0/0/0.02, dsn=4.3.5, status=deferred (delivery temporarily suspended: Host or domain name not found. Name service error for name=postmaster.mydomain.lan type=A: Host not found)
I am unable to figure out why postmaster.mydomain.lan stopped resolving as i can't find out if there was an A record for it to begin with.
postconf -n output:
alias_database = hash:/etc/aliases alias_maps = hash:/etc/aliases command_directory = /usr/sbin config_directory = /etc/postfix daemon_directory = /usr/libexec/postfix data_directory = /var/lib/postfix debug_peer_level = 2 html_directory = no inet_interfaces = localhost inet_protocols = ipv4 mail_owner = postfix mailq_path = /usr/bin/mailq.postfix manpage_directory = /usr/share/man mydestination = $myhostname, localhost.$mydomain, localhost newaliases_path = /usr/bin/newaliases.postfix queue_directory = /var/spool/postfix readme_directory = /usr/share/doc/postfix-2.6.6/README_FILES relayhost = postmaster.mydomain.lan
Update: Figured this out. A dns record for postmaster.mydomain.lan was overwritten while doing an update to our zone transfer file :/