https://bugs.kde.org/show_bug.cgi?id=439904
--- Comment #1 from Richard Weinberger <richard-b...@nod.at> --- I think I've found the root cause. The very first like of ProtonMail encrypted mails are "Content-Type: multipart/mixed;". When I manually change this line to "Content-Type: multipart/encrypted;" Kmail is able to decrypt the message. -- You are receiving this mail because: You are watching all bug changes.