Setting up MX records
To setup MX Records for your email accounts incase you have a different mail server,
go to the "Domains" page under "Client Home" and click your domain name.
Now click the "Manage DNS" icon
In the next page, "Delete" the existing MX record entry from the list of DNS records, if you need to add a new MX record. 
Now click the "Add MX" tab on the top to continue 
In the next page, select a "Priority" for the mail server and enter the hostname of the mail server.
Click "Add" to create the new MX record. You can now see the new MX record in the main DNS records list
