Email bouncing between Exchange servers

I have an Exch2003 server on W2K3 server which has been operating as is for years. We are currently in the process of testing Exch2010 (on W2K8 x64) server with a view to migrating our mailboxes over to it.

The new E2K10 server is on line and working well. I have transferred my own mailbox to it for testing. To get it to send email through our current E2K3 server (which has GFI and email signature software on it) I created a send connector specifying the E2K3 IP address as the smart host and '*' as address space.

I tested this yesterday and it seemed fine but now all external mail instead of leaving the organization from the E2K3 server is getting routerd to the E2K10 server and sitting idle in the submissions Queue. This is the error I am getting.
A configuration error in the e-mail system caused the message to bounce between two servers or to be forwarded between two recipients.  Contact your administrator.
<servername.domain.com #5.4.6 smtp;554 5.4.6 Hop count exceeded - possible mail loop>
sydlegAsked:
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Schnell SolutionsConnect With a Mentor Systems Infrastructure EngineerCommented:


If there is just one Send Connector, stay with the Exch 2003 server alone (take away the Exch 2010 server)

If there is an old Send Connector built in Exchange 2003 and you created a new one in Exchange 2010 including the Exch 2010 servers. Delete or disable this connector




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Schnell SolutionsConnect With a Mentor Systems Infrastructure EngineerCommented:

It shall not be a send connector in order to send the emails from Exch 2010 to Exch 2003. It shall be a Routing Group Connector

The Send Connector at the Organization Level will route the messages to the outside. If this send connector just include Exch 2003 server(s) them Exch 2010 will route all messages to the Internet across Exch 2003 Routing Group Connector



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sydlegAuthor Commented:
There is the standard routing group connector between the 2 servers that is part of the E2K10 installation, but mail sent from a mailbox that is located on the E2K10 server is not going through the E2K3 server. I need this to happen until we are ready for the final cut over.

How to do this?
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