Not sure which category to put this under, but I think this is the right one for my issue.
The issue is with my Windows 2003 server which is running an ASP.NET application on it. I have a page that will e-mail a group of people (members of our golf club). The e-mail uses the built-in SMTP server and IIS.
The e-mail are formatted in HTML. The receiptent of the message is the member and the sender is based on the actual e-mail address of person sending it (basically - the senders e-mail may or may not match the domain hosted on the IIS server).
So what happens is that the mail messages all send fine, with the exception of the aol addresses (about 20 of the 160 e-mail accounts). I get the following error:
Arrival-Date: Mon, 10 Apr 2006 14:11:20 -0500
Diagnostic-Code: smtp;550 won't relay to email@example.com
The server does not appear to be an open relay. I have tested it against everything I could find on the net, and tested it via telnet from a remote workstation and it would not relay - so I'm thinking I have that all setup correctly.
I completely willing to post the domain, if necessary.