> Uwe Brauer wrote: > It works here what I can see, e.g. in/from mail.el you get > < #part type="application/emacs-lisp" buffer="/home/incal/.emacs.d/emacs-init/gnus/mail.el"> This works, what I am saying is: you take a matlab file, extension.m and apply the function mail-attach-buffer This particular type is not recognised for me (using emacs28 master)