David Bremner writes: > I have managed to duplicate (I think) this bug without notmuch or emacs > 25. > > In emacs 24.5.1 (on debian) > > (require 'mml2015) > (setq mml2015-sign-with-sender t) > > M-x toggle-debug-on-error > > M-x message-mail > (fill in some headers, From: me) > C-c C-m C-s > C-c C-c I just tried this script in emacs 25.1 (debian) and could not reproduce the bug. So maybe it's fixed? d