So, the cPanel web hosting management console has a GnuPG Keys area, which allows you to create or import GPG/PGP keys. However, it doesn't seem that the server actually does anything with them once added to this area?
Their documentation indicates "Servers that use GnuPG keys encrypt outbound messages with a public key." Is there a way to configure a cPanel server to always sign outbound email messages with a given GnuPG key? Or is this feature of cPanel just a GnuPG Keyring (an easy way for you to find/reference your keys)?