How do I block an e-mail address from sending messages to our server?
A former employee keeps sending messages from his outside account to our current employees. I have his e-mail address and I want to block his messages.
Go to the Internet Mail Service connector and specify his outside address on the Delivery Restrictions tab under "Reject messages from."
Of course, this won't prevent him from getting a Hotmail or Yahoo! account and sending messages from there, but at least his regular account won't be able to send mail into your server.