I was looking at '/var/log/mail.log' which is the default location Postfix MTA writes everything it does to. I was sadly in that file using Vim and deleted the last line. I didn't restore the removed line and simply saved the file. I noticed now that the Postfix daemon no longer writes anything to the log file since I edited it. No permissions have changed at all. It's still in the same location and owned by the same UID/GID. Code: -rw-r----- 1 root log 189 Mar 3 08:37 mail.log I can see that Postfix is however logging everything under '/var/log/everything.log' Anyone know how to fix this? I am worried I broke Postfix but mail is still flowing and I get no errors at all from Postfix. It's just not writing to 'mail.log' any longer.