Really struggling with this one. I have re-created the routing groups as well in the powershell on exchange 2010.
Mail flow works from Exchange 2010 to Exchange 2003. But not from Exchange 2003 to Exchange 2010. Even after re-creating the routing connectors. I'm really stuck now.
Attached it shows the connectors is unavailable and unreachable. I'm able to ping the server, DNS is ok etc. Please help!
Need to run co-existence for at least a month