Hello everyone I have hit a wall on our exchange 2003 upgrade and hope to get some outside thoughts. We are upgrading from our current 2003 exchange to 2010. Everything is working fine except for sending from My 2003 server to 2010. I get the error
The following recipient(s) cannot be reached:
firstname.lastname@example.org on 2/23/2015 3:00 PM
You do not have permission to send to this recipient. For assistance, contact your system administrator.
<agcex2.test.COM #5.7.1 smtp;550 5.7.1 Unable to relay for email@example.com>
I have tried changing the relay settings on my 2003 smtp virtual server to allow everything as a test with no luck. I can telnet from one server to the other on port 25. I don't understand what would be causing the error. If anyone has any thoughts please let me know. Thanks