ProtonMail is now opensource

[xof]

Pour crypter-décrypter en PGP, vous pouvez utiliser Rainloop, qui est packagé.

Discussion sur le sujet:

PGP encryption for Roundcube or other e-mail client

Rainloop seems to have an OpenPGP module, but I don’t know if it manages send and receive. rainloop.net https://github.com/polytan02/rainloop_ynh if you install it, to configure it the first time : login : admin password : 12345 Then you can configure your domains and OpenPGP. If you need carddav sync, you need to create a mysql database and add it via the admin account.