text/html;       ~/.mutt/mutt_bgrun dwb -p mail --name dwb-mail %s; test=test -n "$DISPLAY";
text/html;       w3m -I %{charset} -T text/html; copiousoutput;
image/*;         ~/.mutt/mutt_bgrun feh %s;
application/pdf; ~/.mutt/mutt_bgrun okular %s;
application/*;   ~/.mutt/mutt_bgrun mimeo %s;