This bug is back in Ubuntu 20.04 postfix/focal-updates,now 3.4.13-0ubuntu1.2
I'm not certain of my analysis, but I see two services postfix.service ----------------------------- [Unit] Description=Postfix Mail Transport Agent Conflicts=sendmail.service exim4.service ConditionPathExists=/etc/postfix/main.cf [Service] Type=oneshot RemainAfterExit=yes ExecStart=/bin/true ExecReload=/bin/true [Install] WantedBy=multi-user.target --------------------------------------------- and [email protected] ---------------------------- [Unit] Description=Postfix Mail Transport Agent (instance %i) Documentation=man:postfix(1) PartOf=postfix.service Before=postfix.service ReloadPropagatedFrom=postfix.service After=network-online.target nss-lookup.target Wants=network-online.target [Service] Type=forking GuessMainPID=no ExecStartPre=/usr/lib/postfix/configure-instance.sh %i ExecStart=/usr/sbin/postmulti -i %i -p start ExecStop=/usr/sbin/postmulti -i %i -p stop ExecReload=/usr/sbin/postmulti -i %i -p reload [Install] WantedBy=multi-user.target --------------------------------------------- It appears the intent of [email protected] is to delay starting postfix.service until after networking is up, but it seems that systemd doesn't accept [email protected] as a valid service $ sudo systemctl status [email protected] Failed to get properties: Unit name [email protected] is neither a valid invocation ID nor unit name. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1519331 Title: Postfix cannot resolve DNS if network was unavailable when it was started, such as on a laptop To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/postfix/+bug/1519331/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
