If you look at the configuration there are two files (maps) we need to create and place it on the server. First, let us create the /etc/postfix/relay_by_sender file which is needed for the sender dependent relay in Postfix
If you look at the configuration there are two files (maps) we need to create and place it on the server. First, let us create the /etc/postfix/relay_by_sender file which is needed for the sender dependent relay in Postfix