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Microsoft Exchange 2010 Event ID 15006

I’ve been having some problems with an Exchange 2010 box filling up its disk space very quickly, resulting in an event ID 15006 in the logs.  The log looks like this


Microsoft Exchange Transport is rejecting message submissions because the available disk space has dropped below the configured threshold.

The following resources are under pressure:
Queue database and disk space (“C:\Program Files\Microsoft\Exchange Server\V14\TransportRoles\data\Queue\mail.que”) = 97% [Medium] [Normal=95% Medium=97% High=99%]
Queue database logging disk space (“C:\Program Files\Microsoft\Exchange Server\V14\TransportRoles\data\Queue\”) = 97% [Medium] [Normal=94% Medium=96% High=98%]
Physical memory load = 91% [limit is 94% to start dehydrating messages.]

The following components are disabled due to back pressure:
Inbound mail submission from the Internet
Mail submission from Pickup directory
Mail submission from Replay directory
Content aggregation

The following resources are in normal state:
Version buckets = 0 [Normal] [Normal=80 Medium=120 High=200]
Private bytes = 5% [Normal] [Normal=71% Medium=73% High=75%]
Batch Point = 0 [Normal] [Normal=1000 Medium=2000 High=4000]
Submission Queue = 0 [Normal] [Normal=1000 Medium=2000 High=4000]


This results in no new messages coming into the system from external sources.  Most of the items I read pointed to just clearing up some space, which was done, but within a few days that extra 10GB was all being used, and we are only talking a small environment < 15 people.  This morning the problem was back again, so we gave the vm another 15gb on the fly, and rather than working perfectly in Windows Server 2008, I got a parameter incorrect error when increasing the Disk Space with Disk Management.  We restarted the machine which then showed the correct amount of new disk space, but it had also cleared up another 40GB which I’m assuming was being held in the message logs.  I’ll do some more investigation and try to find why for those who are interested.

If you don’t want to delete anything or can’t add more space to the system, you can move the location of the logs as detailed on the Sinking Ducks, so credit is due there, but I’ll include it here to save you clicking…

  • Edit the EdgeTransport.exe.CONFIG file, which if installed to the default location should be “C:\Program Files\Microsoft\Exchange Server\V14\Bin”
  • Find the following lines .. and change the path to be the new location you want to use.

<add key="QueueDatabasePath" value="C:\Program Files\Microsoft\Exchange Server\TransportRoles\data\Queue" />
<add key="QueueDatabaseLoggingPath" value="C:\Program Files\Microsoft\Exchange Server\TransportRoles\data\Queue" />

  • Create that folder, and restart the Exchange Transport Services
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