Exchange server 2003 migration problem - legacy server stilling routing emails

I have all my mail boxes moved to the new exchange server 2010, I have moved my public folders but emails headers still have the legacy IP address.  What controls the routing?  why do some emails headers have the IP address of the old email server?
Scott JohnstonIT Manager Asked:
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Will SzymkowskiSenior Solution ArchitectCommented:
Do you still have the RGC's enabled between the Exchange 2003 and 2010 environment? If you have moved all of the features/mailboxes/public folders then you can remove the Routing Group Connectors.

Also have you setup new Exchange Send Connectors to your Smart Host or DNS records?


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AmitIT ArchitectCommented:
You need to create new send connector on Exchange 2010 server. Then remove the RG connectors, then decom 2003 server.
Scott JohnstonIT Manager Author Commented:
What are referring to when you are stating Features?
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Scott JohnstonIT Manager Author Commented:
How does the public folder Disallow Public Folder referrals work?
Scott JohnstonIT Manager Author Commented:
I have the new connector already on the new server 2010, in fact i was able to power down the old server, and it seems that all emails were routing correctly.  I can delete the RGC, in the legacy server?
Scott JohnstonIT Manager Author Commented:
So far so good, the RGC seem ed to fix everything.  Now to decomission the server.......
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