Some server administrators prefer that all outbound email be handled by an external server or a third-party service. If you would like all email routed through another server, you can set up your server to use a smarthost.
To set up a server-wide smarthost, go to WHM's Home »Service Configuration »Exim Configuration Manager and search for the option, "Smarthost Support."
Enter an asterisk (
*) and a space, followed by the value of the smarthost for the server. For example, if you know the IP of the sending server you could use this syntax:
Or if you know the hostname of the server you could use this syntax: