Hi
I am having a problem with some internal messages intermittently not being delivered. When I go to the Exchange ECP -->Mail Flow -->Delivery Reports I can see the following error with the message:
Submitted
2013-03-07 11:36 AM EXCHANGE
The message was submitted to exchange.******.local.
Pending
2013-03-07 11:36 AM exchange.******.local
Message was received by exchange.******.local from Exchange.******.local.
2013-03-07 11:36 AM exchange.********.local
The domain name in the email address is incorrect. Check the address.
554 5.4.4 SMTPSEND.DNS.NonExistentDomain; nonexistent domain
However, usually just waiting a few minutes and then sending to the same recipient, the message will be delivered:
Submitted
2013-03-07 11:41 AM EXCHANGE
The message was submitted to exchange.******.local.
Pending
2013-03-07 11:41 AM exchange.******.local
Message was received by exchange.******.local from Exchange.******.local.
2013-03-07 11:41 AM exchange.******.local
The message has been transferred from exchange.******.local to Exchange.******.local.
Delivered
2013-03-07 11:41 AM exchange.******.local
The message was successfully delivered.
I have setup an Accepted Domain as Internal Relay, with a Send Connector to deliver any mails if the user is not found in Exchange server.