@inthehands the basic problem with that kind of “encrypted” “email” is that it’s only one of those at a time; it’s either encrypted end-to-end and delivered some other way, or it’s encrypted per-hop and delivered as email. None of those services do both at once. It should be possible to do both at once using GPG or S/MIME, but for that to actually work every provider would have to handle it well, and AKAIK none do.
It still baffles me that banks haven’t been pushing this