Adding an MX record manually
To add an MX record:
Connect to the DNS server.
Navigate to Start > Programs > Administrative Tools > DNS. The DNS Manager is displayed.
In the DNS Manager menu in the left pane, click DNS > DNS Servers > Forward Lookup Zones.
Select the zone for which you want to add the new MX record.
Note: Ensure that you have added a zone in the DNS server.
Right-click and select New Mail Exchanger. The New Record dialog box opens.
Do not enter anything in Host or Domain text box. In the Mail server text box, enter the name of the mail server or using the Browse option, select the server. This mail server maps to the specified domain name.
Note: The Mail server text box should not contain any alias names.
In the mail server priority text box, enter a number to designate mail priority among mail servers. The lower the number in the mail server priority field, the higher the priority.
Note: If there are two mail servers with the same priority, one of them is randomly chosen. The value of this field should be between 0 and 65,535.
Select OK.
The new MX record is added.