Stopping external emails in Exchange 5.5

As far as preventing a user from receiving them (Exchange 2K):

Go to Active Directory Users and Groups
Go to that particular user - Properties
Exchange General tab
Delivery Restrictions tab
Message Restrictions

I am unsure how to prevent them from sending, so I hope this help a little.

First, delete this user's SMTP address - this will prevent inbound e-mail from outside.

Then create a routing restriction on the Internet Mail Connector that will not accept outbound mail from their mailbox.

Done deal!

regards,

paul