I have stopped postfix as I have moved the mailserver to another machine.I still get every 5 min, at 14 sec past the minute this: 2016 Nov  8 10:00:14 mail1 fatal: Queue report unavailable - mail system is downI know, dumb machine, I stopped it myself...I can't find any line in any crontab causing this. Where is it comming from?
Stopping postqueue messages when postfix is disabled
postfix