Comment 3 for bug 1519331

Thank you for taking the time to report this bug and helping to make Ubuntu better.

Importance -> Low since this doesn't affect the primary use of Postfix as a server MTA, but only with network-manager on a desktop machine.

FWIW, I use msmtp. I can't queue mails when offline, but otherwise it works fine for me.

It might be worth checking what the situation is on Debian for this use case. There may be a valid bug in Debian as well, and it would be better to follow what Debian do in this case I think.