You can export eM Client desktop blacklist rules to a Settings.XML file and then open that up in an XML editor and copy and paste that into your cPanel rules if your Cpanel allows you to paste them in.
See my post below on how to export rules.
You can also import the exported eM Client desktop Settings. XML file into the eM Client mobile app directly via going to “Menu / Settings / Import / Export / Import Settings from file”
Or if you use the QR Export via the desktop when you are settings up the account on the mobile and select Rules on the mob import wizard.