Well merely thought but perhaps in the near future it would be nice if someone would come up with an addon that would allow merchants to encrypt the content of a confirmation mail to the customer, especially if it contains information on such critical information as password resets on customers accounts.
Now they are sent without being encrypted. Doing that over the web via the classic mail protocol, even via TLS / SSL this is not the way to go in 2017 and beyond.
Just a thought.