How can we keep anti-relay in place and just allow specific servers (three) to relay in/out of the system?
There are numerous fields that you must fill out. You must have inbound controls set to allow your set people to relay. You will need outbound controls as well for these people. You will need the notes.ini parameter AllSMTPHostsExternal=1. Have you thought about having these people authenticate to the server and then excluding authenticated people from relay checks?
This was first published in September 2003