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Exchange 2007 not delivering mail (messages sitting in Outbox)

Posted October 30th, 2008 by Matt Shadbolt

If your email messages are not being delivered – just sitting in the Outbox, it could be due to 2007 resource monitor pausing the delivery due to “insufficient resources”

You can check to see if your server is showing these symptoms by TELNETTing to the localhost on port 25 and attempting to manually deliver a piece of mail. You may receive the “insufficient resources” error.

A quick and dirty way to resolve this error without actually giving the server more resources is to disable the monitoring – this is recommended as a short term fix only.

To disable the Exchange Monitoring:

1. Browse to the EdgeTransport.exe.CONFIG file (normally found at %systemdrive%\Program Files\Microsoft\Exchange Server\Bin) and open the file in notepad
2. Find the string <add key=”EnableResourceMonitoring” value=”true” />and change the “true” to “false”
3. Now either restart the Exchange services or reboot the server (I like to reboot the server just to be sure!)

Again, this is only a temporary measure – and I would only suggest using it in a lab environment. However if you plan to upgrade your hardware in the short term this trick might just get you though.

Tags: EdgeTransport.exe.CONFIG, Exchange 2007, Exchange Monitoring, localhost

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