In the Brightmail Gateway you need to add the new domain to the accepted Domains
To Add a Domain:
Navigate to "
Protocols>SMTP>Domains"
Click "
Add"
Enter the domain information for which you want to accept mail
Click on the "
Delivery" Tab and review the information on this page and make any changes needed.
Note: After adding the domain if you are using Directory Integration/LDAP you will need to add or modify your settings to collect user information from this newly
added domain.