Topic Last Modified: 2007-05-16

The default domain is used to stamp messages from addresses that do not have a domain. A Simple Mail Transfer Protocol (SMTP) virtual server can have one default domain. The default domain can't be deleted.

To name a default domain, you can use the primary DNS suffix assigned to your computer. By default, this name is the same as your Active Directory directory service domain. If your computer is not joined to a domain, you can specify a DNS suffix on the DNS tab in the Advanced TCP/IP Settings properties of your LAN connection. This domain name is also used for all other services. Alternatively, you can specify a unique domain to serve as the default for Windows Server 2008 SMTP Server only.

At startup, the DNS suffix configured for the computer is automatically used for the default domain. If you change the DNS suffix on the DNS tab, the new name is used automatically for the default domain the next time that the SMTP service is started. No action is required to update the default domain for the default SMTP virtual server.

To override the automatic use of the network domain, rename the default domain. The SMTP virtual server can then use the designated name instead of the network domain.

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