Dev/Test site - Prevent Emails from sending

[Administrator]

On a test or developer site, if you want to prevent the system from sending emails, add the following to your constants.php file.  If you enter a valid path it will log any emails a file, if you don't need that then enter the second option of /dev/null/

define( 'EMAIL_DEBUG_PATH', "/home/user/devmail");

define( 'EMAIL_DEBUG_PATH', "/dev/null");