Email encryption

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Learn how to enable post-quantum protection in Proton Mail to generate new quantum-resistant encryption keys for your account.

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3. Email encryption

As of January 2020, Proton Mail no longer supports TLS versions 1.0 and 1.1. Going forward, we will only support TLS 1.2 or later.

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2. Proton Mail
3. Email encryption

Proton Mail employs different methods to protect your privacy and your security. One method of protecting messages from being read by outsiders is encryption. However, encryption alone does not protect you from all security vulnerabilities. For i

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3. Email encryption

Proton Mail supports PGP encryption to send encrypted messages to encrypt emails: PGP/MIME and PGP/Inline.

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3. Email encryption

Digital signatures are like a physical signature but on a specific piece of data — one of several ways Proton uses to protect your privacy and security.

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3. Email encryption

Proton Mail employs different methods to protect your privacy and security. While our end-to-end encryption protects your email from being read by outsiders, it does not ensure that your email has been sent by the right person. For example, if john@e

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All Proton Mail data at rest and in transit is encrypted. However, subject lines in Proton Mail are not end-to-end encrypted, which means if served with a valid Swiss court order, we do have the ability to turn over the subjects of your messages. You

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2. Proton Mail
3. Email encryption

We explain what exactly is encrypted in Proton Mail and how to send end-to-end encrypted messages to non-Proton Mail users.

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2. Proton Mail
3. Email encryption

Proton Mail lets you easily send secure, end-to-end encrypted emails to non-Proton Mail email addresses using a password.