How to install ProtonMail Bridge

ProtonMail Bridge is an open-source application that allows you to fully integrate your ProtonMail account with any program that supports IMAP and SMTP. This includes Microsoft Outlook, Mozilla Thunderbird, and Apple Mail.

It runs in the background on your computer and seamlessly encrypts and decrypts your mail as it enters and leaves your computer.

To use the ProtonMail Bridge, you need to:

  1. Download the ProtonMail Bridge app
  2. Add your account(s) to ProtonMail Bridge
  3. Configure your email client (Outlook, Thunderbird, Apple Mail) to use ProtonMail Bridge

Download ProtonMail Bridge for your platform:

[Windows] [macOS] [Linux (DEB)] [Linux (RPM)] [Linux (PKGBUILD)]

Add your account(s) to ProtonMail Bridge

1. Install ProtonMail Bridge, open the app, enter your ProtonMail account details, and click Sign in.

Sign in

2. Your account is now successfully connected to ProtonMail Bridge. You can see your ProtonMail Bridge settings and credentials under Mailbox details. You will use these credentials to configure your email client (Thunderbird, Outlook, etc).

See your ProtonMail Bridge settings and credentials under Mailbox details

Setup is now complete.


1. By default, you will be in combined addresses mode. This means emails from all of your addresses will be sent and received together in the same mailbox.

Split addresses mode allows you to add each of your addresses to the client separately.  To use split address mode:

a. Toggle the Split address switch on.

Enable split addresses mode

b. Click Enable split mode in the confirmation box that appears.

Enable split addresses mode 2

2. Sign out of your account to disable sending and receiving new emails. Your existing emails will still be stored in your email client.

Sign out

If you are signed out, which can also happen if you change your password, you can Sign in again to access your account (if you only have one ProtonMail account, you will sign in from the Welcome screen). 

Configure your email client

The final step is to configure your email client (for example, Outlook, Thunderbird, or Apple Mail). 

[Email client configuration guide]

If you have any questions, our Frequently Answered Questions support article may answer them.

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