I have installed Exchange 2003 then Exchange 2007 in the past in my test environment and it worked great but not this time.
I recently installed Exchange 2003 and it can send and receive internaly and externaly fine. ( Exch 2003 only)
When I installed Exchange 2007 SP2 I pointed it to use my Exchange 2003 as a bridgehead but email internal or external does not flow between Exch 2003 and Exch 2007.
I can send from my Exch 2007 mailbox to himself but not any other Exchange servers in my environment. ( I also installed Exchange 2010 and its behaving the same way)
I read about and ran Exchange 2007 commands to setup "Interop RGC" Now when I look at the Routing Group in ESM 2003 I can see the connector from Exch 2003 to Exch 2007 but that did not fix my issue.
I've compared my environment to a friends and it looks just like his but his works.
I have my Exchange 2003 on a hardware server which is also my domain controller and my Exchange 2007 and Exchange 2010 are on VMWare server. Not sure if that matters.
DNS entries are correct for all servers.
What would be my next troubleshooting step ?