https://bugs.kde.org/show_bug.cgi?id=362697
Axel Hinrichs <k...@a.bitscape.de> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |k...@a.bitscape.de --- Comment #1 from Axel Hinrichs <k...@a.bitscape.de> --- I can confirm this bug with some additional info. I have the same problem with utf-8 coded filename* parameters. So it looks like the messageviewer does not implement https://tools.ietf.org/html/rfc5987 which then referes to https://tools.ietf.org/html/rfc2231. (Very) short summary: One can issue a MIME Header Content-Disposition: ..., filename=filename.ext or - if the filename contains non ISO-8859-1 letters: Content-Disposition: ..., filename*=coding'language'filename.ext So in my case the MIME-Part header looks like: Content-Disposition: attachment; filename*="utf-8''some-filename-with-utf-8-encoding.ext" Double quotes are optional but allowed according to RFC. Kmail takes everything between the double quotes literally as the filename. I'm on arch linux so everything pretty current: KDE Apps 17.04.1, Plasma 5.9.5, Framework 5.33.0, QT 5.8.0 -- You are receiving this mail because: You are the assignee for the bug.