Yes ofc but that approach is way to high if we talk about private communication in general (and not just in the contect of emails). you need to go to the lowest level. I am full anon for a loooong time. but the opsec is extremely expensive on that level. it starts with the hardware and all providers you use. I would never communicate with TCP/IP for a safe connection! And have you ever thought about the charging cables you use for your devices ;) ?! Unfortunately I cant specify the last statement in this env^^