FAQ / Server Products

My Exchange server is reporting "452 4.3.1 Insufficient system resources" when Hexamail tries to send email to it. What can I do?
This error usually relates to a lack of disk space on the disk holding the Microsoft Exchange mailbox database. The solution is to move the mailbox database to a drive with more space or clear some space on the existing drive.

Useful links:

http://exchangepedia.com/2007/03/exchange-server-2007-transport-452-4-3-1-insufficient-system-resources.html

http://technology.bauzas.com/microsoft/servers/exchange/exchange-2010/how-to-fix-error-452-4-3-1-insufficient-system-resources-on-exchange-server-2007-or-2010/

There are also the following guides: