I'm currently trying to introduce the Edge Transport server into our Exchange environment. I've managed to sync the Edge server and can also telnet to the Edge, but I'm getting a #550 5.7.1 Unable to relay ##. I was able to send/receive email before the Edge was introduced.
The Edge synchronization was also successful.
I currently have a receive connector configured on the Edge called 'Default internal receive connector EDGE'. The status is enabled with the following settings:
-Transport Layer Security (TLS) is checked
-Enable Domain Security (Mutual Auth TLS)
-Exchange Server authentication is checked.
Any thoughts as to what could be causing the #550 5.7.1 Unable to relay error message?