How to proxy emails by domain

Introduction

This How-To will show you how to proxy email traffic so that emails sent to a domain on one server will be proxied over to another server.

Procedure

To proxy email sent to a domain, you must set that domain in '/etc/manualmx'. You can do this by using the whmapi1:

How do I add or remove a domain from /etc/manualmx?

An example of this command  can be found below, where "example.tld" is the domain you wish to proxy, and "mailhostexample.tld" is the proxy destination:

whmapi1 set_manual_mx_redirects domain='example.tld' mx_host='mailhostexample.tld'