[Users] [Bug 3457] broken winmail.dat attachments cause crash

[Pierre Fortin]

On Thu, 02 Jul 2015 15:13:52 +0000 noreply at thewildbeast.co.uk wrote:

>I did some additional research, unfortunately we *HAVE* to use the tnef
>plugin, because outside people really do send us stuff in that horrible
>method (rather than just attaching files directly).

A while back, I ran into a message requiring tnef, and wondered why it
was necessary to wrap a simple PDF file with a few bytes that added
NOTHING (except aggravation) to the attachment....

In case it helps...

A quick google search for "tnef format specification" and "tnef
deprecated" provided some old docs (last updated in 2009) and some
interesting blog posts which seem to indicate a bug when Exchange 2013
and Exchange {2010,2007} are involved...
http://bill-long.com/2014/06/02/TNEF-property-problem-update/