We are developing a new website that has a feature where they can filll out a form on our website and submit it to an e-mail address on our exchange 2003 server. It's an Expression Engine using Php on the website. The website is sitting on our DMZ and I have opened port 25 to go from the webserver to the exchange server. I can telnet mailserver 25 but I get a -0500 code at the end of my telnet. Is that an authentication issue? Regardless, I can't get an e-mail message to go through. On the Expression Engine side, I entered a user I setup in AD, with an e-mail account to send through. I have set that user Relay privledges on SMTP in exchange. Not sure what else to look at.