Install ruby-mail-gpg by entering the following commands in the terminal:
sudo apt update sudo apt install ruby-mail-gpg
Description:
GPG/MIME encryption plugin for the Ruby Mail Library
This tiny lib adds GPG/MIME capabilities to Mail::Message and ActionMailer::Base. Because privacy matters. . For maximum interoperability the lib also supports decryption of messages using the non-standard 'PGP-Inline' method as for example supported in the Mozilla Enigmail OpenPGP plugin.
Homepage: https://github.com/jkraemer/mail-gpg
Version: 0.3.3-1
Section: universe/ruby