Possibility to send encrypted messages without password
At the moment Protonmail offers to send encrypted emails to non-PM users using a password encryption. This function is really secure but often unpractical. There should be an option where the encryption would work the same way, that the receipent would fetch the email from PM servers through a link, but no additional password would be needed. This method is widely used in post-GDPR world with government and some private actors. This would still be considered secure mail eventhough it doesn't have a password. The option with a password needs to remain of course and the selection would be up to the user.
Nicholas Ngai commented
How would this work? In theory, this would mean that anyone with the link could access the “secure” email, and those recipients would already have an unencrypted inbox that Google or anyone else could read, and they could follow the link themselves.
The reason the password is needed is because the password is the decryption key for the email. If there were no password, there would be no key to encrypt/decrypt with.