Solving problem related to systemd process
I like postfix. This is really smart and secure mail server. I'm helping above dozen clients around the world and tunning postfix is really fun task. This morning I was downgrading postfix to the stable version for one of the my friends and come across interesting issue.
I don't like systemd. This service takes so much responsibility IMHO. I'm preferring init.d scripts (looks like I'm old fashion guy). If service can not start then checking startup files is correct way.
I have not seen it in default systemd directory and check that other files are present and are correct. finally detect it under /etc/default:
But this file is softlink to /dev/null only:
I've deleted this only and reinstalled postfix for generating new one. After this postfix is going to be green.