My mail server seems to be running fine from what I can see but when I ran this command ( I realized this Tshooting a client ) I receive these errors.
Should I be concerned? This was on a clean install of virtualmin and I have other boxes that his this same problem with clean virtualmin installs.
postconf: warning: /etc/postfix/master.cf: undefined parameter: mua_sender_restrictions
postconf: warning: /etc/postfix/master.cf: undefined parameter: mua_client_restrictions
postconf: warning: /etc/postfix/master.cf: undefined parameter: mua_helo_restrictions