SSh to server
cd /root
mkdir download
cd download
wget https://download.configserver.com/cmm.tgz
tar -xzf cmm.tgz
cd cmm/
sh install.sh
Login to WHM and scroll to the bottom of the left hand menu and you should see "ConfigServer Mail Manage"
If you want to uninstall, simply:
rm -fv /usr/local/cpanel/whostmgr/docroot/cgi/addon_cmm.cgi
rm -fv /usr/local/cpanel/whostmgr/docroot/cgi/cmmversion.txt
rm -Rfv /usr/local/cpanel/whostmgr/docroot/cgi/cmm/
