I wonder if there is a solution to secure e-mail exchanges: trust the sender or the sendee and crypt messages. I saw some articles about PGP and GNUPG… And this page on encryption with Roundcube : http://trac.roundcube.net/wiki/Dev_Encryption
It seems that there is nothing really ready to use. Does any body know of a solution? And specially a solution that could run with Yunohost!
Thanks. Mailvelope looks fine. But as far as I understand, it has not yet a signature feature. I am looking for a mean to authenticate the sender of the mail. I would also like the app to be remote, on a safe server, my Yunohost server ;).
Rainloop works fine and has a nice interface. The OpenPGP option is exactly what I was looking for. Thanks @maxime for the hint and thanks polytan02 (?) for the integration in Yunohost (even if it is not yet SSO and plug and play ).
The trouble is that Rainloop does not store the PGP keys on the server, but on the local storage of the browser. That is:
You have potentially different keys, depending on the PC you are using.
Your keys are accessible from the browser, even if you are logged out (I tested this); this is particularly annoying for the private keys.