Greetings, I am having a very frustrating time with a new Exchange 2003 Standard 2003 install Windows 2003 Standard Server, I am able to send me to the internet but not able to receive. I get a bounced back message similar to the on below from MSN, sending to my server: smtp;550 5.7.1 Unable to relay for I have checked the recipient policy and all seems fine, the DNS MX record seems to fine too. Te domain I am having problems with is mixtecinc.com This problem is driving crazy as I had a working install of the Beta of Exchange 2003 RC1 and Windows 2003 server RC1 working fine. Any help greatly appreciated. Justin Maas