Hi Ralf:

In message <20160703145255.GF15240@runtux.com>,
Ralf Schlatterbeck writes:
>Ralf Schlatterbeck added the comment:
>On Sat, Jul 02, 2016 at 08:40:57PM +0000, John Rouillard wrote:
>> Could this be handled by a simple change to your patch for implementing:
>> 
>>  msg_header_property
>> 
>> set msg_header_property=None to suppress the header?
>
>Yes I think this should work, adding a test for this would be a good
>idea to make it a documented use-case.

Sounds good, but I don't see any tests for the msg_header_property
code. I assume you forgot to chekc them in when you checked in the
code. Could you check in your test and I will update it with the None
case.