1. Click the Settings node to open the general settings page.
2. Click the Local Domains tab
and specify the name of the domain in the
Domain box.
3. Click Add to include the stated domain in the
Local domains list. If you want to remove a listed domain, select it from the list and click
Remove.
NOTE: You can use the local domains option if you want to configure local mail routing in IIS differently, for example, to add domains that are local for mail routing purposes but which are not local for your mail server.