Install claws-mail-pgpinline by entering the following commands in the terminal:
sudo apt update sudo apt install claws-mail-pgpinline
Description:
PGP/inline plugin for Claws Mail
This plugin for Claws Mail verifies signatures of digitally signed messages, and decrypts encrypted messages. It's also required to send signed and encrypted messages using inline method (deprecated).
Homepage: http://www.claws-mail.org
Version: 3.16.0-1
Section: universe/mail