I'm in the middle of a migration from a SBS2003 to a SBS2008 server.
All the mailboxes are set to the new server without problems.
I moved all replica's to the new server en this morning checked if everything was fine but in the there are a lot of mails waiting in the SMTPRelayToTiRg with the following 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.
With the mail flow troubleshooter I get the following errors:
The 'Remote delivery' queue (FIKASBS\3) on server FIKASBS is in retry status. Number of message(s) in the queue: 1339. Last error information: 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.
Server mail.fysiotherapiekudelstaart.nl is a remote server to which server FIKASBS is trying to send messages but no 'Host' records of server mail.fysiotherapiekudelstaart.nl can be obtained from any DNS servers server FIKASBS uses. This may be causing message backups in the queue.
In the old mail server there are the following settings on the Default SMTP Virtual Server:
It's look like the server cannot deliver the mails from the public folder to the new server but I cannot findout what is causes.