Introduction
From time to time, cPanel support may request that CSF's MailScanner be disabled. Here you may find the steps to do so.
Procedure
Within WHM navigate to Home »Plugins »ConfigServer MailScanner Front-End. Under "MailScanner Configuration", you'll see the icon "MailScanner Disable". Selecting this option will disable Mailsanner and revert the mail server to exclusively use exim.