>I referred to this in my comment. It's proprietary, communicates with ProtonMail over their proprietary API, and is only supported for paid users. These are fundamental features of an MTA, not a paid addon, this is absolutely disgusting.

This goes back to the my original point that protonmail is pgp for most people. You sound like the sort of person who'd use a self hosted email server + some IMAP/POP3 client + some PGP client with self managed keys. Maybe having an open stack is important to you, but people like you are definitely in the minority. Most people don't know and/or care what PGP, IMAP, or MTA is, but they want something more secure than gmail/outlook.

Lying to laymen about security is morally wrong. The security guarantees protonmail claims to provide literally cannot be guaranteed.

And for the record, I wrote my comments on "Hacker" News, not in my local newspaper. The readers here are not "most people" and I can expect many more of them to have similar values to me.

Being unable to prove a companies claims yourself != company lieing.

A year ago, they posted on Reddit: "Audits have been done, about one per year usually. Cyberkov has done 3 audits since 2014 (they recommend it for their activities with Palestinian activists, so security audits are necessary)"

Do you claim that the independent security firm Cyberkov is lying too?

With the preponderance of evidence they've provided (security audits, open source, and transparency into how everything works), if you're saying that this is a big scam and they're lying about everything, it's really up to you now to provide some evidence.