It's postfix@$INSTANCE. If you don't have multi-instance setup, the default instance is "-", so you would look for postfix@-, not postfix@. This is discussed in README.Debian. You should probably file a new bug for this problem if you don't get it figured out.
-- 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 ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs