In light of the above the bug seems to be cause by interaction of the packages postfix, resolvconf, and network-manager by using postfix on a portable desktop machine as opposed to a server with static network configuration.
Since I am using mutt as mail client, I need a local MTA. Postfix seemed a valid choice, especially with the simple configuration using a smart host for all mail delivery. But it seems desktop GNU/Linux does not support this classic setup any more. :-( -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to postfix in Ubuntu. https://bugs.launchpad.net/bugs/1519331 Title: Mail delivery fails until restarting postfix To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/postfix/+bug/1519331/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
