4.3.1 Insufficient system resources
Posted by on 10 March 2014 10:13 PM

Below you will find a link to the Microsoft explanation, and to some other work around for this issue.

452 4.3.1 Insufficient system resources - on relay of: mail from


A reputable resolution can be found at the following URL:


The Resolutions:

1. Disable Back Pressure (https://exchangepedia.com/2007/03/exchange-server-2007-how-to-turn-off-the-back-pressure-feature-on-transport-servers.html) or
2. Modify the parameters to more accurately define what’s high utilization for your deployment or server configurations or
3. Move the Queue database to another volume with ample of free space (http://technet.microsoft.com/en-us/library/bb125177.aspx)

If you have gone through the above suggestions with no luck. Click the link below for Microsoft's explination, and fix.




ERROR: This domain name does not match domain registered in the license key file (cms.orlinpilot.com), allowed domains: support.excelmicro.com,localhost, please change the product path to match the domain under Admin CP > Settings > General Settings
This product will not work properly unless untill that value is changed.

For more information please contact Kayako support at https://my.kayako.com