Exchange 2007 452 4.3.1 Insufficient system resources error

Article Details

URL:	http://support.digiportal.com/support/esupport/index.php?_m=knowledgebase&_a=viewarticle&kbarticleid=171
Article ID:	171
Created On:	10 Jun 2008 12:36 PM

Answer

Problem: In the Choicemail forward logs there is an ERROR during message forwarding.Error forwarding mail. Server returned 452 error code (Your mail server replied with:452 4.3.1 Insufficient system resources)

Analysis: This is probably happening due to the Back Pressure feature in Exchange Transport service.

Solution: First step is to reconfigure the Transport service you can do this by doing the following: Open the "EdgeTransport.exe.config" file which is located Program Files/Microsoft Exchange Bin folder.

Disable Resource monitoring or change the monitoring configuration:

Open the "EdgeTransport.exe.config" file with notepad and change resource values or even easier just disable the monitoring completely.
If you are changing the resource values the string should go from
add key="EnableResourceMonitoring" value="true" /
To
add key="EnableResourceMonitoring" value="false" /
Once this is done save the file and restart the Microsoft Exchange Transport service.