I recently migrated a customer from Exchange 2003 to Exchange 2007 ( as part of SBS 2008). Since doing this, they have been getting a number of non-delivery messages based upon the recipients server carrying out a reverse lookup on the mail server address. To put some detail on this, the old mail server was called OLDSERVER but mail was masqueraded to be sent from MAIL.mydomain.co.uk which was setup in the external DNS so that reverse lookup worked correctly. The new server is called NEWSERVER.mydomain.co.uk, and mail shows as coming from that address. Reverse lookup on the IP address however still shows as MAIL.mydomain.co.uk and therefore fails. I want to change the address mail appears to be sent from back to MAIL.mydomain.co.uk. Everywhere I have looked suggests that I would do this in the "Send connector" in Microsoft Exchange Management Console (EMC->Organisation Configuration->Hub Transport->Send Connectors), but when I look in there, the FQDN that shows is WEB.mydomain.co.uk which is the address I set for Outlook Web Access. Somewhere else must be setting the Send Address for outbound email to NEWSERVER.mydomain.co.uk, but I cannot find out where in order to change this?
When I run the command "Get-SendConnector | ft Id*,fq*" in the Exchange Management Shell, it returns the FQDN of WEB.mydomain.co.uk, but when I telnet to the server on port 25 and issue HELO, it responds with NEWSERVER.mydomain.co.uk!
Where is this being set and how do I change the sending server address or set a masquerade address to MAIL.mydomain.co.uk.