Displaying and replying to ms-tnef / winmail.dat attachments from #outlook in #mutt

.mailcap snippet

application/ms-tnef; tnefsmime %s; copiousoutput

.muttrc snippet

# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
#
# Automatically use entries from ~/.mailcap to view these MIME types
#
#       auto_view <type> [ <type> ... ]

auto_view application/x-gunzip application/x-gzip text/html application/ms-tnef

tnefsmime

#!/usr/bin/env bash
filename=$(realpath -P $1)
dir=$(mktemp -d)
cd $dir
tnef $filename
for f in $(ls -1)
do
    if [ "$f" = "smime.p7m" ]
    then
        gpgsm --decrypt $f
    else
        cat $f
    fi
done
rm -rf $dir

See G+ Post: https://plus.google.com/+FriedrichDelgado/posts/F6VdyoRrHMV

I probably should mention the obvious: the script does no security checks whatsoever and makes some strong assumptions about my personal environment.

For example if somebody sneaks an alias for mktemp into your environment, rm -rf will delete all your files.

And I put my smime keys into gpgsm, obviously.