These are the versions of the exchange servers:
Exchange 2016 CU23 - 15.1 Build (2507.6)
Exchange 2010 SP3 - 14.3.0513 Build(123.4)
The problem is sending and receiving emails in Exchange 2016. Creating the send and receive connector in Ex2016:
| Send | Receive | message |
|---|---|---|
| Ex2010 | Internet | OK |
| Internet | Ex2010 | OK |
| Ex2016 | Internet | 4.4.7 Queue Expired |
| Internet | Ex2016 | 4.4.7 Queue Expired |
| Ex2010 | Ex2016 | 4.4.7 Queue Expired |
| Ex2016 | Ex2010 | OK |
Without connector to send and by default receive in Ex2016:
| Send | Receive | message |
|---|---|---|
| Ex2010 | Internet | OK |
| Internet | Ex2010 | OK |
| Ex2016 | Internet | OK |
| Internet | Ex2016 | 4.4.7 Queue Expired |
| Ex2010 | Ex2016 | 4.4.7 Queue Expired |
| Ex2016 | Ex2010 | OK |
Perform tests with Microsoft Remote Connectivity Analyzer. The test mail arrives and passes the tests.Also with Chektls and without problems
Reading on the internet, there are more problems in Ex2010, I was thinking if this problem is corrected by recreating the connectors as done in Exchange 2003 - 2010
Reviewing the RDN message in a little detail, I realize that it only checks the message in Ex2010 and does not ask in Ex2016 if the mailbox exists. I have created test mailboxes on both servers and I can access them in OWA, that is where I have these problems sending and receiving emails
Ex2010 in 10 MX Ex2010.contoso.com
Ex2016 in 20 MX Ex2016.contoso.com
Thank you very much for the help and patience it took me to respond.
I found the problem, it was configuring physical firewall policies. While testing with telnet I realized the problem.
This is a free test server for connection.
This is where I see the difference in connection, despite performing several test tests with Microsoft Remote Connectivity Analyzer and everything went well without problems.