Set inbound e-mail authoritative for a domain in Exchange 2010
To set an authoritative inbound e-mail domain
Browse to the following folder, where C:\Program Files\Microsoft\Exchange Server is your exchange installation location:
C:\Program Files\Microsoft\Exchange Server\TransportRoles\Shared\
Open the file Domains.config with notepad (or any other text editor).
Then edit this file as follows:
Domain Name : This domain name can be a DNS name, like woodgrovebank.com, *.woodgrovebank.com or * (all domains)
Authoritative : Boolean (True or False)
For example:
domain name=”woodgrovebank.com” authoritative=”true”
This means all mail for woodgrovebank.com is allowed.
domain name=”*” authoritative=”false”
This means the server is an Open Relay server




