By default, ProtonMail now uses One-password mode. This means the same password is used to log in to your account and decrypt your mailbox. One-password mode provides security and convenience, which is why we recommend it for most people.
It is also possible to switch to Two-password mode, and if you have a very old ProtonMail account, Two-password mode may still be enabled by default.
Learn how to switch to Two-password mode (or One-password mode if you currently use Two-password mode)
As its name suggests, Two-password mode secures your Protonmail account with two passwords:
- Login Password
- Mailbox Password
Your Login Password is the first line of defense to ensure no intruders are allowed into your account. This password is stored on ProtonMail servers and allows ProtonMail to confirm your identity.
Your Mailbox Password decrypts your mailbox so you can read your encrypted emails. This password is not stored on ProtonMail’s servers — it is stored in your browser or on your device and is used to decrypt your mailbox locally each time you log in to ProtonMail.