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Routing email between Exchange 2007 and 2010

Posted on 2012-03-21
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Last Modified: 2012-05-01
Morning Experts,

I have added an Exchange 2010 server to our environment.  All mail is routing through our Exchange 2007 server.

Users on 2007 can send to users on 2007 but not to 2010
Users on 2010 can send to users on 2010 but not to 2007
Users on 2007 can send and receive external email
Users on 2010 can send external email but not receive

I know this is a connector issue but not quite sure what connectors I need and permissions to go on them.

Thanks in advance for any assistance.
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Question by:Simon2301
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Suraj earned 500 total points
ID: 37748773
For 2010 to receive internet mail - you need to check Anonymous users in permission tab on receive connector.

For mail flow between 2007 to 2010 or visaversa check the following :
Are you able to resolve the fqdn of each other ?
Are you able to ping the fqdn of each other?
Are you able to telnet the fqdn of each other on port 25 ?
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Expert Comment

by:Suraj
ID: 37748783
Also tell me what is the last error showing in the Queue viewer for the queue where mails are stuck?
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