The messages have a text "Unsubscribe", when i clic on "UNSUBSCRIBE" text or "WHY AM I RECEIVING THIS MAIL?", I get a Internet Explorer Windows with a form for Unsubscrit to list distribution. I need cancel this message since
PoweeShell or ECP.
The OS es Windows 2012 R2 and the exchange server is Exchange 2013.
I attach the picture with the header.