Login and mailbox passwords explained

Proton Team

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Update: As of December 2016, Proton Mail has switched to a single password system as the default. The two-password mode described in this article is still available and supported, but is no longer the default.

Proton Mail uses two passwords to secure your account: login and mailbox.

Login password

Your Login password is the first password you enter and it authenticates you and logs you into our secure system.
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Your login password is the first password you enter and it authenticates you and logs you into our secure system.


MailBox password

Your Mailbox password is the second password you enter and this unlocks and decrypts your encrypted messages locally.
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Your mailbox password is the second password you enter and this unlocks and decrypts your encrypted messages locally.


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Proton Team

We are scientists, engineers, and specialists from around the world drawn together by a shared vision of protecting freedom and privacy online. Proton was born out of a desire to build an internet that puts people before profits, and we're working to create a world where everyone is in control of their digital lives.

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