troubleshooting Question

Multiple Exchange Servers and email external but not between themselves

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odlsecurities asked on
ExchangeWindows OSMicrosoft Legacy OS
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We have an existing Exchange environment consisting of clustered backend servers (2 nodes), an Exchange front-end server in our UK AD site. I have created a new Exchange Server (Basic) in Japan (Japan AD site).  All the servers are on the same domain but there are domain controllers in each site.  Exchange System Manager shows all the servers in the Exchange environment.
There is a smtp link with AD sites and Services.

The UK Servers works fine, it can email externally and recieve from external addresses.  It can email users on the same Exchange server fine.

The Japan server can email externally and recieve from External addresses.  The message header shows the email route the exchange front-end server as required. It can email users on the same Exchange server fine.
I can move a mailbox between one the UK Exchange server and the Japan server fine.

The issue is the two exchange servers can not email between each other?  The email sit in the other server queue, e.g. mail from the japan server sits the the london server queue on the japan server.  This mail eventually times out with the error:
Could not deliver the message in the time limit specified.  Please retry or contact your administrator.
            <UK #4.4.7>

There is a connector in place which is set to use DNS to route to each address space on this connector with a bridgehead which is the front-end server.  The address space is defined as  * with a cost of 1.

Any help would be greatly appreciated.


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