From the header:
Received: from xtinmta04-26.exacttarget.com (xtinmta04-26.exacttarget.com. [207.250.68.26])
by mx.google.com with ESMTP id a13si1399491ybi.60.2011.09.16.13.00.45;
Fri, 16 Sep 2011 13:00:45 -0700 (PDT)
Received-SPF: pass (google.com: domain of bounce-2465060_HTML-803209068-134868...xacttarget.com designates 207.250.68.26 as permitted sender) client-ip=207.250.68.26;
I'm not overly paranoid but I believe this is a scam? I'll wait and see what else comes of it before I do anything.