550 5.7.1 Unable to relay for ... external mail
Posted on 2004-08-25
I have a network, Exchange 2000, IIS. I also have a web page with APS code that sneds out emails using CDONOTS or ASPMAIL components. When I send an email with this code locally, the email reaches its destination. BUt if I put in the external email address, it gives me the error:
550 5.7.1 Unable to relay for email@example.com
This sounds like a common problem. What settings should I change.
Thank you very much.