[mumblemumble]

I'm not even sure it's all that great of a trick, considering that no amount of encryption and security on Proton's own servers or in their app can protect the contents of emails that are sent to (edit: or received from) someone who doesn't use Proton.

I am a current customer and think they've got a really well-done service and app, but lately I've been wondering if it's the privacy equivalent of the Maginot Line.

[stevenicr]

Makes me wonder if its possible or reasonable to consider an option with protonmails (and similar) - have a note in the footer of the email - explaining that encrypted is default in their system, but sending to your email provider has it converted to plain text where others can access it.. if you'd like to keep this mail message private click to login to protonReadPortal - where you can read, and if you'd like make a passphrase, to reply and keep messaging on secure servers.. get an optional app for replies to your contacts that have proton accounts.. then tap to checkbox so further emails to you from proton accounts send you a notice to check out the protonReadPortal instead of including the plain text..

I'd want my protonReaderApp to have default shred message after reading.. keep available on proton server for 48 hours after.. one click to save as pdf or zip or other safer password format, or save on protonServer longer.. with easy to change defaults..

would be nice option. I dunno maybe something like this exists?

There are several use cases for this..

a system like this could make for encrypted form storage and messaging with the right API maybe hippa compliant?

I'd expect my lawyers and accountants and such to use something like this.

[floriol]

You can already do that with protonmail. There are three buttons available when writing an email, doing exactly that.