My organization employs a contract employee, and the powers that be want this user to be able to send and receive messages only to a specific group of 5 employees. Contracted employee should not be able to receive messages from anyone other than these 5 (done easily with Delivery Rescrictions in AD U&C), but as far as limiting his ability to send to everyone/anyone else in the Exchange server, as well as outbound internet email, i am stumped. Web searches didnt turn up anything that would make this reasonably realistic. Any help would be greatly appreciated.
Exchange 2003 SP2 (6.5b7638.2)
on Windows 2003 R2 (fully patched)
Windows 2003 R2 domain controllers, native mode