Comment This is research? Where's the beef? (Score 5, Insightful) 117
All of the tools listed don't work by verifying the identity of the sender. If you fail to look/behave like a spammer/cracker/phisher, your email will get through unless you use a white list at which point 99% of people outside your list won't know how to get an email to you even though the rejection letter spells out the correct procedure. I wonder how many people actually tried to join Bill's linkedin account and of those what percentage thought it may actually *be* Bill. I'm gonna guess it's somewhere around zero.
Now excuse me, I have to get back to forwarding Bill's email I got to 20 people so have I have a chance at the million dollar prize.