Proton
Empowering you to choose a better internet where privacy is the default. Protect yourself online with Proton Mail, Proton VPN, Proton Calendar, Proton Drive. Proton Pass and SimpleLogin.
Proton Mail is the world's largest secure email provider. Swiss, end-to-end encrypted, private, and free.
Proton VPN is the world’s only open-source, publicly audited, unlimited and free VPN. Swiss-based, no-ads, and no-logs.
Proton Calendar is the world's first end-to-end encrypted calendar that allows you to keep your life private.
Proton Drive is a free end-to-end encrypted cloud storage that allows you to securely backup and share your files. It's open source, publicly audited, and Swiss-based.
Proton Pass Proton Pass is a free and open-source password manager which brings a higher level of security with rigorous end-to-end encryption of all data (including usernames, URLs, notes, and more) and email alias support.
SimpleLogin lets you send and receive emails anonymously via easily-generated unique email aliases.
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The native Proton applications are needed due to the encryption of Proton Mail. 3rd party clients do not work for this reason.
At least on Windows it works with Thunderbird.
Only because of the bridge, which is handling the encryption part. That works on Mac as well as on Linux also.
However an integration to 3rd party clients without such an encryption layer (Bridge) doesn't work.
For those unaware, proton mail bridge is a program that sets up a local proton proxy that decrypts the emails then serves them up via a local imap server. Thus the "bridge." So Thunderbird isn't pulling from proton, the bridge is pulling the encrypted mailbox and decrypting, Thunderbird pulls from local unencrypted bridge.
https://proton.me/mail/bridge
Thanks for the further information and participation in the thread here.
Doesn't this kinda defeat the point?
The objective is to always keep your email store encrypted in transit and on proton's server. This is a decryption relay to be used on trusted systems, decrypted with your key. It then serves it up to your email app with startls encryption and an app password, keeping the local store encrypted. Then you can set up your email client to not download a local copy, as you already have a local copy on your local proton store served by your local proton proxy server. I'd argue its more secure than accessing it through a browser, as there is less likely to be malicious add-on activity.