opening winmail.dat attachments in osx

Monday, September 09, 2013

Microsoft. Outlook. It sends attachments in its own weird an wonderful format as a single file called winmail.dat, for those of us fortunate enough not to have Outlook as our email client to unpack them. There's an opensource project, TNEF which provides a tool that unpacks these well

  1. Download the tnef tar
  2. Untar it (tar -xf .., or just double click)
  3. Follow the README steps (note the make install needs to be run with sudo)
It installs into /usr/local/bin as well so now from anywhere you can run:
tnef winmail.dat
And the files will all be unpacked into the current dir. Sweet
As a side note, I tried the LookOut plugin for Thunderbird, but its output files weren't actually valid