Tag Archives: back pressure

452 4.3.1 Insufficient system resources(Event ID 15006 and 15002)

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KB ID 0000165 

Problem

When attempting to send mail to an Exchange EMail Server, you see the above error message. Usually the Exchange can send mail out and exhibits no other problems. You may also see one of the following error messages in the servers event log.

This is caused by an Exchange “Feature” Called “Back Pressure”, and the usual culprit is, there is less than 4Gb (Lowered to 500Mb with SP1) on the drive that holds the mail queue.

Solution

Option 1: Free up some room on the server hard drive so that it has more than 4GB (or 500MB with Exchange SP1) free.

Option 2: Move the mail queue database to another drive that has free space. Note: This is Microsoft’s preferred action.

Option 3: Turn off Back Pressure.

1. Locate the EdgeTransport.exe.config file (Its in Exchange ServerBin).

2. Open the file with notepad and add the following key as shown, (Paste it in).

<add key=”EnableResourceMonitoring” value=”false” />

3. Restart the servers “Microsoft Exchange Transport Service.”

Related Articles, References, Credits, or External Links

Exchange 2007 – Emails go Straight to ‘Drafts’

Exchange – Emails go Straight to ‘Drafts’

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KB ID 0000898 

Problem

It’s been such a long time since I’ve seen this, but I got this problem this morning at one of our sister companies.

When attempting to send and email, via Outlook (or Outlook Web Access), the email does not get sent and instead drops straight into the users drafts folder.

Solution

1.Locate the EdgeTransport.exe.config file (By default it will be in c:Program FilesMicrosoftExchange ServerBin but your location may differ). Take a backup of this file then open it with notepad.

2. Locate the line that contains;

[box]<add key=”PercentageDatabaseDiskSpaceUsedHighThreshold” value=”0″ />[/box]

3. Change its value form 0 to 90 like so;

4. Then reboot the server.

If the problem persists see the following article:

452 4.3.1 Insufficient system resources
(Event ID 15006 and 15002)

Other Causes Of This Can Be;

  • The Microsoft Exchange Transport Service is not running.
  • The Microsoft Exchange Transport Service is NOT running under the ‘Network Service’ account. (Note: Put in any password it will work!)
  • SMTP is not responding on the server can you ‘telnet localhost 25’

Related Articles, References, Credits, or External Links

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