That is true. But just so you know: I am a paying protonmail customer and received an email just today where they anounced tha IMAP/SMTP support is in closed be

That is true. But just so you know: I am a paying protonmail customer and received an email just today where they anounced tha IMAP/SMTP support is in closed beta. I do not know how this is implemented and what the exact security implications are. Here is an exerpt from the email: Dear ProtonMail Plus Subscriber, We are happy to announce the beta program for a new product that adds IMAP and SMTP support to ProtonMail. We call this project the ProtonMail Bridge. The ProtonMail Bridge is among the most requested features by the community and lets you send and receive encrypted emails from within your mail client of choice. The Bridge supports any client that uses IMAP/SMTP including Outlook, Thunderbird, and AppleMail. We will be choosing only a few dozen people to start so if you are interested in participating please fill out the following form by the end of this week: