I'm new to exchange. I have the exchange server set up. It is currently working. I'm trying to set up IMAP/SMTP for remote users. I can't seem to get it to relay to external domains. I have it set to relay for auhtenticated computers but it seems that outlook nor Pocket PC's authenticate through the internet. If I take a PC on our network, logged in to AD the smtp server will relay. What am I missing? FYI.... If I add the IP address to the relay restrictions it will relay, But ip address's will change for clients so this is not a solution. I gave this question 500 points because I would like to move on with my install instead of spinning my wheels on something so small and I have not been able to figure it out myself.