Using the Internet Mail Service Without DNS

You can use the Internet Mail Service without installing DNS. To do so, update the Windows NT Server Hosts file with the IP address and domain name of all hosts to which the Internet Mail Service should transfer messages.

You also need to add the domain name and IP address of the Internet Mail Service server to the Hosts file or DNS of all SMTP servers that forward mail to the Internet Mail Service.

A sample Hosts file can be found in the Windows NT Server system directory under Drivers\Etc. The following is an example of a Hosts file:

123.45.67.123		sales.fab.com
11.22.33.44 			company.com 		sales.company.com