I have been trying to create a group in Active Directory (Windows Server 2003 Standard Edition) that would allow for it's members to send and receive internal mail only (Exchange 2003 SP1). No internet based e-mails are to be sent or received for this group. I have been trying to do this using the following procedure...
...but so far have been having no luck. I don't receive any error messages at any point, and have followed the first section “Restricting users from sending internet based e-mail” step 1-7, to the letter yet I can still send internet based messages from a user that I add to the specific security group.
Is there another procedure that someone could suggest which proves to be more successful?