Thanks, that is the doc I worked from. The nature of this topic is about learning best practices for Nethserver I am guessing as I think I am too new to the system to know if I am asking the right questions. I am not new to admin work just to how I need to configure things in Neth properly. What I expected to work per documents did not so I am missing something in my understanding. Thank you for your patience.
I can see main.cf has a new value from running the command sequence but it is not live per telnet test and responses 220 and 250 were not showing the config property change. I restarted postfix several times from the web GUI and from a shell to no avail. Being new to a CentOS/Nethserver system I don't want to hand configure things though I did as a test explained below.
Other guides for postfix talked about setting $mydomain so I did:
myhostname = xxxx.com
mydomain = xxxx.com
myorigin = $mydomain
At the top of /etc/postfix/main.cf under the warning to not edit the file with manual changes being lost after it is regenerated. After a postfix service restart, a telnet test showed the change, which is great. For Windows users and outlook that do not have a FQDN, I also commented out the smtpd_helo_restrictions section.
I have read Neth documents concerning e-smith flat file database configuration and was in search of how it affects the email server configuration when I saw the previous response to this topic.
So...how do I go about making the changes properly to make this configuration permanent ? I'm sure the lesson will apply to the rest of how the Neth configuration works so should be helpful in a big way