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missing email

Posted on 2015-01-30
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Last Modified: 2015-02-06
Just added a second exchange 2010 server to our system, it has the cas hub and mailbox roles installed and I have started getting users complaining of sent emails not being delivered, checked the logs but there is no sign of the missing email in the logs stumped to be honest, any help much appreciated
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Question by:Jon Carney
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Author Comment

by:Jon Carney
ID: 40579895
Right I've found the email sitting in the new servers mail queue, looks like the CAS array has started load balancing between the two servers, but the new server is unable to route out or through the old server, any ideas how I can get the mail moving off the new server?
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Author Comment

by:Jon Carney
ID: 40579985
meant to say we are in co-existence with exchange 2003 so would I need to create a second routing group connector between the new server and the exchange 2003 system?
Anyone!!
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Expert Comment

by:Ivan
ID: 40580176
Hi there,

this can happened in 2003 to 2010 migration. One of the solution I applied was recreating send connectors.

Link: http://www.petenetlive.com/KB/Article/0000234.htm (scroll to the mid of article)

Get-RoutingGroupConnector | Remove-RoutingGroupConnector

New-RoutingGroupConnector -Name “Exch2003-Exch2010″ -SourceTransportServers “EX-2010.petenetlive.com” -TargetTransportServers “EX-2003.petenetlive.com” -Cost 100 -Bidirectional $true

Net Stop "Microsoft Exchange Transport"

Net Start "Microsoft Exchange Transport"

Regards,
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Author Comment

by:Jon Carney
ID: 40580209
Thanks for the reply, the first server is able to send mail fine both internally and externally but the second server seems unable to send either way it's as though the first server will not relay mail from the second server even though I've added the server as a source server so it's not just routing between 2003 and 2010
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Author Comment

by:Jon Carney
ID: 40580213
"source server" on the 2010 receive connectors
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Author Comment

by:Jon Carney
ID: 40581401
Looking at the queues we have 2 external smarthost connectors showing error 421 4 2 1 unable to connect and one saying 451.5.7.3 cant achieve exchange server authentication on the routing group connector, anyone??
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Accepted Solution

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Jon Carney earned 0 total points
ID: 40583488
Right fingers crossed I think I've sorted it, there were two problems firstly, there was a relay receive connector set up and the range overlapped the second servers IP so it looks as though the second server was trying to use that connector and of course it couldn't authenticate, secondly the external connectors route through a smart host which is set to only accept traffic from the external IP that was natted for the first server so when I added the second in as a source server it couldn't connect, removed it as a source server and let the first do the routing and the queues disappeared (all except shadow redundancy that is)
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Author Closing Comment

by:Jon Carney
ID: 40593205
Found the solution myself
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