Large Mail.que database in Exchange 2013

Question

[Background]
Since Exchange 2013 is released, some user may come across the following situations:
The space of disk C is used up.
The transport service stops processing messages.
The Mailbox server is crash.
In this case, the issue can be resolved with checking with the mail.que file which is in the following path on the Mailbox server:
C:\Program Files\Microsoft\Exchange Server\V15\TransportRoles\data\Queue
[Symptom]
The Mail.que file on all Exchange 2013 servers grows very large and it’s even over 20 GB.
[Cause]
It’s a by design behavior.
Different from the previous Exchange server, Safety Net which has the same function with the Transport dumpster in Exchange 2013 takes up the volume of the mail.que file and
it’s the feature which is responsible for the large size of the mail.que in Exchange 2013.
 And here is a reference about the feature Safety Net in Exchange 2013:
http://technet.microsoft.com/en-us/library/jj657495(v=exchg.150).aspx
[Workarounds]
1. Allocate large space for the Exchange 2013 installation or increase the volume for Exchange 2013.
These articles will also provide further detail of size calculating:
http://blogs.technet.com/b/exchange/archive/2013/05/14/released-exchange-2013-server-role-requirements-calculator.aspx
http://blogs.technet.com/b/exchange/archive/2013/05/06/ask-the-perf-guy-sizing-exchange-2013-deployments.aspx
(See section: “Transport storage requirements”)
2. Moved queue database to another drive by using
Move-DatabasePath
3. Reduce the SafetyNetHoldTime and MessageExpirationTimeouton values to one day (default values are 2 days). And these commands can be in use:
Set-TransportConfig SafetyNetHoldTime 1.00:00:00
Get-TransportService | Set-TransportService -MessageExpirationTimeout 1.00:00:00
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Answer 1

[Background]
Since Exchange 2013 is released, some user may come across the following situations:
The space of disk C is used up.
The transport service stops processing messages.
The Mailbox server is crash.
In this case, the issue can be resolved with checking with the mail.que file which is in the following path on the Mailbox server:
C:\Program Files\Microsoft\Exchange Server\V15\TransportRoles\data\Queue
[Symptom]
The Mail.que file on all Exchange 2013 servers grows very large and it’s even over 20 GB.
[Cause]
It’s a by design behavior.
Different from the previous Exchange server, Safety Net which has the same function with the Transport dumpster in Exchange 2013 takes up the volume of the mail.que file and
it’s the feature which is responsible for the large size of the mail.que in Exchange 2013.
 And here is a reference about the feature Safety Net in Exchange 2013:
http://technet.microsoft.com/en-us/library/jj657495(v=exchg.150).aspx
[Workarounds]
1. Allocate large space for the Exchange 2013 installation or increase the volume for Exchange 2013.
These articles will also provide further detail of size calculating:
http://blogs.technet.com/b/exchange/archive/2013/05/14/released-exchange-2013-server-role-requirements-calculator.aspx
http://blogs.technet.com/b/exchange/archive/2013/05/06/ask-the-perf-guy-sizing-exchange-2013-deployments.aspx
(See section: “Transport storage requirements”)
2. Moved queue database to another drive by using
Move-DatabasePath
3. Reduce the SafetyNetHoldTime and MessageExpirationTimeouton values to one day (default values are 2 days). And these commands can be in use:
Set-TransportConfig SafetyNetHoldTime 1.00:00:00
Get-TransportService | Set-TransportService -MessageExpirationTimeout 1.00:00:00
Please click to vote if the post helps you. This can be beneficial to other community members reading the thread.
You cant move the queue database with move-databasepath. You have to follow this method:
http://technet.microsoft.com/en-us/library/bb125177(v=exchg.150).aspx
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