[Mailman-Users] Return-Receipt and Outlook 12.0

[Kevin J Dunlap]

I am seeing "Uncaught bounce notification" e-mail from my Mailman 2.1.9.
The unhandled message looks like a "return-receipt" for a read of an orginal
e-mail sent thru a list managed by Mailman.

I have looked at the header of the e-mail that the reader is sending the 
receipt too.  There is no "Return-Receipt" in the e-mail header.  
Thanks to Cleanse.py it is striped out.  

The orginal e-mail is generated by "Microsoft Outlook 12.0"
and the e-mail client generating the receipt is :
X-Mailer: Microsoft Office Outlook 12.0

Is anyone else seeing "Return-Recipt" e-mail generating uncought bounce notification e-mail?

Is MS hiding "return-receipt" inside another field, like X-MS-TNEF-Correlator:

Thanks,
-Kevin