I would like to use The Bat with a secure email service, Mailbox.org. Is there a straightforward way, not too complicated, to set this up with PGP encryption?
The relevant Help page (https://www.ritlabs.com/en/support/help/75/#id1) says, "The Bat! offers built-in PGP conforming to RFC-1991." But when I go to Options -> OpenPGP -> Choose OpenPGP Version, the option shown in Help (Internal [RFC -1991]) does not appear. Does The Bat! no longer provide built-in PGP? (I am running v 9.5, released today.)
Buying Symantec Desktop Email encryption is another option, but is costs $70 per user, and I don't think it is open-source.
Using GnuPG seemed like a good idea because it is free (I don't mind paying a little), and it is open-source. But it looks like it requires a lot of study to figure out how to set it up with command line.