Originally Posted by Hans
Before i did this it was never necessary to restart Postfix.
Since i have installed Munin & Monit, every night at 0:00 hour Monit restarts Postfix, so a new PID-file is created.
It's not monit who restarts Postfix, it's ISPConfig (in order to generate thetraffic statistics). monit just sends you a notification that Postfix has been restarted.