I have a mixed exchange 2003 exchange 2010 environment.
I had my original exchange 2010 server die unexpectedly. Ever since then none of my other 2010 exchange servers can send e-mail to my exchange 2003 server.
When I bring up the queue viewer I am seeing a next hop domain that contains my original 2010 server and all the messages are stuck within it.
My hunch is the other 2010 exchange servers where relaying through the original exchange 2010 server to get to the 2003 recipients however now that my original 2010 server is gone none of them can connect to the exchange 2003 organization.
How can I either create a new SMTP relay to my exchange 2003 organization or can I modify the existing misv-2008dc-misapp6 relay connector in some way so that another 2010 server can be used to relay to the 2003 organization?
The exact error message I am getting shows
Delivery Type: SMTP Relay in Active Directory Site:
Last Error: 451 4.4.0 Primary target IP address responded with: "421 4.2.1 Unable to connect." Attempted failover to alternate host, but that did not succeed. Either there are no alternate hosts, or delivery failed to all alternate hosts.