So, I am guess that the postfix/main.cf file is generated.
Essentially email from a host is getting blocked because they do not have the proper reverse DNS setup up. I want to allow email from that server to make it through. I have reject_unknown_host turned on, so I think I just want to add the server hostname (or IP) to mynetworks.
But every time it starts up, the file gets regenerated.
Where should this setting go? Or is there a different want to achieve this?