Hi , I'm a newbie with encryption tools. I have install Gpg4win 2.3.1 with Kleopatra It runs obviously on Windows (7 exactly). I do have 2 mails with their certificates. Kleopatra even recognises them and put the parent as "Trusted root certificate". BUT, Claws 3.13.2 send the error [S/Mime: "Cannot sign, Non trouvé (27)]