I have installed exchange 2013 on an environment running exchange 2010, and I have migrated several mainlboxes to exchange 2013.
I can telnet into both exchange servers from the other and run commands.
Problem: I cannot send email from exchange 2013 to exchange 2010.
Additionally:
- I can send/receive email between external (gmail) and exchange 2013.
- I can send from exchange 2010 to (exchange 2013 and external (gmail)), but I cannot get any email to exchange 2010.
- Initially, I was not able to even send email from 2010 to 2013, but adding the servername of exchange 2013 into the host file of 2010 resolved the issue. So, I also added 2010's servername into 2013's host file, thinking this would resolve the issue of not getting emails to 2010 but it did not resolve the issue.
When I look in 2013's Message Queue Viewer I can see my emails to exchange 2010 with the retry status:
It seems like an issue with the exchange 2010 receive connectors, but I am certain I didnt make any changes to the receive connectors on exchange 2010.
Any assistance would be greatly received.