Comment 3 for bug 1490607

postfix only ships an init.d script, which makes it impossible to capture any stdout/stderr into the journal (or rsyslog etc.). So this would translate to "please ship a proper systemd unit".

However, this particular bug report just shows that your file system (or even hard disk) is seriously broken: https://launchpadlibrarian.net/215975520/JournalErrors.txt shows tons of errors, and amongst them some reasons for postfix:

Aug 31 08:03:42 hostname postfix/trivial-rewrite[22559]: fatal: /etc/mailname: file has 2 hard links

Closing as this is not a problem with postfix but with a corrupted file system.