I don't really think that's the problem. Not at all. The problem is that USPS is an easy mass attack target since nearly 100% of people get mail. If you want

I don't really think that's the problem. Not at all. The problem is that USPS is an easy mass attack target since nearly 100% of people get mail. If you want to phish people, you need to cast a wide net, and this one is the widest possible one.