1) Login to your WebHostingZone account at https://www.webhostingzone.org/members/clientarea.php
2) In your account go to "Domains" >> "My Domains" and click "Manage Domains" menu next to domain you would like to edit

4) Click "Management Tools" and from drop down menu choose "Manage DNS"

5) Enter "Host Name" choose MX (Email) type from "Record Type" enter IP Address, enter Priority and click "Save Changes".
