When you give your email address to a website, you hope that they don’t sell or trade your address to a bunch of spammers. Well if they do, here is a simple way to see what sites are responsible for what particular piece of email. This requires you have a Gmail account.
You’re looking at an ancient post shared from Digg. The Internet Archive has a copy of the original post. Still an excellent tip which I use to this day. It’s interesting to see just how much data is shared. I used a price comparison site recently when looking for contents insurance. I rang one of the insurance companies direct to see if it’d result in a different price. I was asked basically the same questions and the resulting quote was identical so I went ahead and bought over the phone. I gave them my details and as a side note they asked to confirm whether they had the correct email address, they read my email address out including the suffix of a plus sign and the acronym I’d given the comparison site.