SuExec is an Apache feature that gives users the ability to run CGI and SSI programs using user IDs that are different from the user ID of the calling web server. This effectively means that CGI and SSI programs will not have access to the root account or have root permissions. Since lots of CGI scripts are used to send mail, it will be easier to see who is sending mail on your server as well.
1 To access the Service Configuration Menu, click on Service Configuration Setup, on the main screen of your WebHost Manager interface.
2 Click on Enable/Disable SuExec.
3 Click on Enable to enable SuExec or click on Disable to disable SuExec.