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kevincavanaghFlag for United States of America

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Exch 2003 emails not sending to Exch 2007

I have just installed an Exchange 2007SP3 server (don't ask why Exch 2007) into our Exch 2003 environment.  I can send messages from a mailbox I moved onto the Exch 2007 system to users on the Exch 2003 but I cannot get messages to go from the 2003 server users to the 2007.  They sit in the Routing Group Connector that got installed during the installation of Exchange 2007.  Thanks in advance for your assistance...
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Simon Butler (Sembee)
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Thanks for your response.  It looks like Exchange 2007 created two RGCs, one for the 2007 Exchange and one for the 2003 Exchange that I can see on the Exchange 2007 console.  Should I remove both them?  Also, I have smarthosts on the SMTP virtual server but they deliver mail to outside domains that we have had problems sending to in the past.  I presume you do not mean to remove those.  What should I do in that scenario?  I am just currently interested in routing email internally back and forth between the Exchange 2007 and Exchange 2003 servers...thanks.
"Also, I have smarthosts on the SMTP virtual server but they deliver mail to outside domains that we have had problems sending to in the past.  I presume you do not mean to remove those"

Yes I do. You MUST remove them. You cannot have a smart host on the SMTP virtual server for email to work correctly.

If you need to use a smart host for delivery then configure that on an SMTP Connector, and a Send Connector on the Exchange 2007 server.

Simon.
I misspoke in my previous entry.  I do not have smarthosts on the SMTP virtual server but do have SMTP connectors with SmartHosts configured in them.  Let me know if you can think of anything else...thanks.
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I'll have time to check this later in the week and I'll let you know...thanks for your assistance.