MakeUseOf – “The first thing you do when you hear that email notification is check the sender, right? It is the quickest way to figure out who the email is from, as well as the likely content. But did you know each email comes with a lot more information than what appears in most email clients? There’s a host of information about the sender included in the email header—information you can use to trace the email back to the source. Here’s how to trace that email back to where it came  from, and why you might want to…”