Exchange email problem sending messages only

We have started seeing all of our outgoing email backed up.  Incoming and internal are fine.  I did get an error on the queue of the exchange server that said read:
the pipleline has been stopped.  It was runnng the command 'get-message 0resultSize '1000' -ReturnPageInfo $true -SortOrder' +FromAddress' -server "my servername.com' -SearchForward $true -bookmarkObject $null -BookmarkIndex '1' -Includebookmark $false -Filter '((Queue -eq "servername\submission'))"
BussRosAsked:
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BussRosConnect With a Mentor Author Commented:
We have taken the 2003 out of the mix and all is fine again.
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ExchangePanditCommented:
How do you send out emails smarthost or DNS?
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Matt_D_GreenCommented:
Also make sure all your Exchange services are running on the server.
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BussRosAuthor Commented:
We send out through a smarthost on Mimecast.   A little background information.  We are moving from 2003 to 2010.  restarting the smtp service on our 2003 server fixed the issue.  We only have about 2 users left on the 2003 side so it is a weird issue that it would have those problems.
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suriyaehnopCommented:
Do you set the " Send Connector" on Exchange 2010 Hub Transport server route external emails?
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BussRosAuthor Commented:
no other comments addressed the solution
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