And you send over insecure protocol like SMTP? Yes, it encrypt on server but does not encrypt sending and recv - email protocol does not work - that why gmail have green/red alert on income email/
Yes, SMTP is insecure. Protonmail emails are end-to-end encrypted at rest. So server admins or whoever can’t just look at all your emails whenever they want, potentially years after they’ve been received.
Contrast that with Fastmail, Gmail, or other providers. At any moment someone who works there can look at customer emails. I prefer my emails encrypted at rest.
Tnx for the information. I did not want to suggest any books - the only reason is there is 1000 links on what book. But I want the reader to develop skills from 0 to advance.