Exchange 2K7 - restrict send to a few domains?
There's a bunch of younger users with mailboxes in their own storage group/store.
I want to be able to stop them sending external mails anywhere besides some permitted domains, in fact ideally that would include permitted wildcards e.g. *.sch.uk. And vice versa for receiving.
I'm struggling to find a way that doesn't involve writing a little "transport agent" and I'm not convinced that will be ideal e.g. can you figure out that an outbound mail is from someone with a mailbox in a particular store, and vice versa for inbound?
Anyone got any clues on how to do this with minimum effort?