# text/html; w3m -I %{charset} -T text/html; copiousoutput;
# text/html; pandoc -f html -t markdown; copiousoutput; compose=vim %s
# application/pdf; pandoc -f html -t markdown; copiousoutput; compose=vim %s
application/pdf; ~/.mutt/attach_fork.sh okular %s
application/vnd.openxmlformats-officedocument.wordprocessingml.document; libreoffice %s
application/octet-stream; ~/.mutt/attach_fork.sh okular %s

text/html; ~/.mutt/gen_html.sh %s
text/html; w3m -I %{charset} -T text/html; copiousoutput

image/jpeg; feh
image/png; feh