text/plain; vim %s ;
text/html; ~/.config/mutt/etc/htmlopen.sh %s ;
text/html; w3m -I %{charset} -T text/html; copiousoutput;
image/*; ~/.config/mutt/etc/muttimage.sh %s ; copiousoutput
video/*; setsid mpv --quiet %s &; copiousoutput
application/pdf; cp '%s' /tmp/doc.pdf && setsid zathura /tmp/doc.pdf &; copiousoutput;
application/pgp-encrypted; gpg -d '%s'; copiousoutput;