Note to self
After upgrading the server to Ubuntu 17.10 Postfix had died without reporting any error. It just wont start, without giving a hint about what was going wrong. Even connecting with telnet on localhost port 25 wasn’t possible. However, the firewall looks fine just like the rest of the processes.
After digging a while I found the
upgrade-configuration command in Postfix. That returned:
sudo postfix upgrade-configuration
Note: the following files or directories still exist but are no longer part of Postfix:
Just a note, nothing fatal right? But when I deleted those two deprecated files and restarted the daemon, it just works! Weird.
sudo rm -f /etc/postfix/postfix-script /etc/postfix/post-install sudo postfix upgrade-configuration sudo service postfix restart
This is on Postfix 3.2.3.