Disable cpanel to forward email to yahoo, gmail and hotmail

Hi,

How do I have cpanel server wide settings that ban Email Account Forwarders to gmail.com, hotmail.com & yahoo.com... | Read the rest of http://ift.tt/2pCcJ15

from Web Hosting Talk - Hosting Software and Control Panels http://ift.tt/2pCcJ15
via https://ifttt.com/ IFTTT