Irony, anyone? I’m analyzing some spam from computer security firm WebSense. It has no opt-out. I’m not positive but the spam possibly begins if you sign up to receive a white paper, e.g. “The Executive Guide to Data Loss Prevention.”

Received: from ssdeagapp2 (10.8.1.84) by ssdexch3.websense.com (10.8.2.52) with Microsoft SMTP Server id 8.1.358.0; Fri, 8 May 2009 17:25:52 -0700

They’re genuine emails from the folks at WebSense; they offer no opt-out; and I can’t find anything on their website to stop the emails. I suspect a misconfigured email delivery option somewhere in their network…