>I think it goes off the rails in step 2.

This went off the rails well before I started to write it. But let me push back on your thoughts.

If I am understanding Microsoft's argument correctly for this court case, they are trying to equate e-mails to letters. And, by extension, equate themselves to UPS/USPS/FedEx whathaveyou. E-mails are private correspondence, just like letters in the post. And please, correct me if I'm wrong in this assessment.

It is also a felony in the US to open someone's mail. So wouldn't that same protection exist in email? Which would mean nobody can look at an email correspondence unless they were either the sender or receiver of said email.