RelayConf - Version 1.0 A simple application that can help exchange administrators manage the relay control options of Microsoft exchange. Microsoft exchange 5.5 Service pack 1 includes several options for dealing with mail relay. They do, however, require you to add several registry keys to the exchange server and restart the internet mail service. relayConf can do this for you with a simple to use GUI interface. What's more, it can do it remotely.