Restricting sending to specific groups in Exchange 2003

[frontal]

I'm sure that this is covered somewhere......

I would like to prevent a specific group (students) from emailing to other members of that specific group. But I do want to allow them to email other groups such as Teachers etc.

Does anybody have some ideas? :?:

[mrforgetful]

Active Directory Users and Computers.

On the Properties of the Group you want to stop students sending to go to the Exchange General tab. In the Message Restrictions section at the bottom select the 'Only From' button and add the Groups you want to be able to send to it.

Incidentally, if you check the From Authenticated Users Only box they should only receive emails from people in your domain effectively stopping students receiving emails from outside school.