Here we are discussing how to change the outgoing mail IP address of a domain in cPanel.
By default the outgoing mail relying IP address for all the domains is the mail shared IP address or the IP address which is assigned in /etc/exim.conf file(interface = X.X.X.X)
But if you want to set another IP address for a domain to relay its mails though the server can be done by;
vi /etc/mailips domainname: ip This will tell Exim to use that IP for the domain.