I got a spam about a photo contest from nielsencontests that told me to unsubscribe, send UNSUBSCRIBE to email@example.com. I did so, and got the below failure notice. Seems that the people behind nielsencontests are IPNStock! Seems that the person at IPNStock is gone or has an invalid address.
I am upset that IPNStock is running a contest and disguising this fact. Along the same vein, I once purchased a subscription from Photo District News and stupidly gave them a valid email address a few years ago. They sold that email list EVERYWHERE. I am still getting blasted by photo-related spams from this one error. I've complained bitterly to PDN about this several times.
------ Forwarded Message
Date: Mon, 10 Dec 2007 18:10:08 -0600
Subject: Delivery Status Notification (Failure)
This is an automatically generated Delivery Status Notification.
Delivery to the following recipients failed.
Arrival-Date: Mon, 10 Dec 2007 18:10:08 -0600
X-Display-Name: Cotlier, Keith
From: Norbert Wu
Date: Mon, 10 Dec 2007 16:09:52 -0800
------ End of Forwarded Message