The fact you are able to receive emails that look indistinguishable from legitimate ones sent by the apparent sender is surely a problem with the email protocol

The fact you are able to receive emails that look indistinguishable from legitimate ones sent by the apparent sender is surely a problem with the email protocol, not really a UI issue, though certainly hiding the sender address is a part of it. Why we still communicate using a channel that does nothing to verify sender legitimacy in this day and age baffles me somewhat, and it really shouldn't be a difficult problem to solve (e.g. who browses the web without using https these days?)