Postfix relay backup server
I have been setup a Postfix realy backup server but only can service the registered domain.
Now I have been edit the config file in main.cf and transport
The problem that is I want to open it to other people, and donot want to edit the config file for each customer.
I want to change the DNS MX record only.
Is postfix can do that (just like sendmail), and how to do that. I can't find any information in the website, pls help