Proton Mail

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Multi-account support is now available on the new version of Proton Mail iOS.
Access all your Proton Mail accounts on the go with your iOS device.

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Our Proton Mail Android app is open source. We are committed to transparency and
contributing to the open source and privacy tech community.

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Our Android security model explains what our app does to secure Proton users’
data. This article outlines how we handle data and mitigate potential attacks.

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Our Bridge app is now open source for macOS, Windows, and Linux. Find links to
the code and an independent security audit report.

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You can use Proton Mail Bridge with IMAP/SMTP email clients. Here we explain the
Bridge security architecture and how it protects your data.
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Proton Mail Linux users can now connect their email accounts with the
Thunderbird client.

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This document describes the vulnerability disclosure policy our security team
follows when we discover flaws in third-party products.

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DKIM key management lets users rotate their keys manually, making it harder for
attackers to spoof their email address.

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Russia has periodically made attempts to block Proton Mail. Here is the current
status and how you can bypass blocks placed on Proton Mail.

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We have released the Proton Mail iOS app as open source software as part of our
commitment to transparency and supporting the developer community.
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We have published the Proton Mail iOS security model to highlight how Proton
Mail for iOS has a higher level of security compared to typical apps.