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Exchange 2010 Missing Email

Posted on 2014-03-26
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Last Modified: 2015-02-26
I am experiencing an issue with Exchange 2010 and undelivered email.  I have a single Exchange 2010 server with two mounted databases.  I have seen a large amount of growth over the last few weeks due to business operations.  A new monitoring system had recently been deployed but was not configured properly.  It caused the drive with my mounted databases to almost fill up.  Users quit receiving email from external sources.  The problem was not noticed or reported for about 8-10 hours after it occurred.  The exchange server is running on a VM so the additional space was added to the server and it was rebooted.  Before rebooting I verified there were no messages in the queues awaiting delivery.  I assumed any undelivered messages would be resent by the orginating server once the issue was corrected.  That has not happened so I am basically looking at 8-10 hours of lost email.  Does anyone have any suggestions or can someone shed some light on this one for me?
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Question by:bullfrog264
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Expert Comment

by:Simon Butler (Sembee)
ID: 39957074
It depends where the loss occured. If the server was accepting email at the time then the email wouldn't have been rejected at the point of delivery. It would be delivered and then queued.

Were the databases actually mounted throughout this outage?
What does message tracking say?

Simon.
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by:bullfrog264
ID: 39957575
The databases were mounted when the storage was added.  I did reboot the server afterwards which would have dismounted the databases gracefully.

Message tracking shows outbound and internal messages only.  It doesn't show any of the inbound messages.  Supposedly no undeliverable messages have been received.  I cannot remember if the I checked to see if the queues were empty before or after I rebooted the server.  I would assume rebooting the server wouldn't clear out the queues.
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Simon Butler (Sembee) earned 500 total points
ID: 39957656
Is there anything else on the server that could have take the messages? AV/Antispam etc? If the messages do not appear in message tracking then they haven't got through to Exchange.

Simon.
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Author Comment

by:bullfrog264
ID: 39957679
I double checked out Anti-virus and it is clean.  I verified that it is still excluding the proper directories and processes as well.  I also checked our perimeter Spam\Virus filtering but I do not see it in there either.
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