Protonmail Bridge Linux Setup

ProtonMail Bridge for Linux is a desktop application that integrates ProntonMail's privacy and security features with an email client. This application is compatible with most email clients that support IMAP and SMTP. ProntonMail Bridge is available for Windows, Mac, and Linux.

Protonmail Bridge Linux

This application's key feature is that it encrypts all the email messages that you send and decrypts the email messages that you receive to your ProtonMail account. You can save all emails in the email client from which you access your account.

To set up  ProtonMail Bridge Linux, perform the step-by-step instructions given on this page.

Step 1 - Download ProtonMail Bridge

  • Open your default browser on your Linux computer.
  • Download the ProtonMail Bridge for Linux from the manufacturer website.

Step 2 - Install ProtonMail Bridge for Linux

Method 1 - Using an RPM file

  • Download the public key (bridge_pubkey.gpg) to the current working directory.
  • To import the public key, enter the sudo rpm --import bridge_pubkey.gpg command line in the Terminal window.
  • Enter the rpm --checksig protonmail-bridge-1.2.6-1.x86_64.rpm command in the Terminal window. This will check the downloaded RPM package.
  • If the command you enter runs successfully, you will see the protonmail-bridge-1.2.6-1.x86_64.rpm: digests signatures OK message.
  • To install the RPM package using your package manager, enter the dnf install protonmail-bridge-1.2.6-1.x86_64.rpm command line.
  • Note: Ensure that the file name in the commands matches the downloaded ProtonMail Bridge Linux version.

Method 2 - Using a PKGBUILD file

  • To verify the ProtonMail Bridge for Linux, open Terminal and enter the mkdir /tmp/build && cd /tmp/build command line.
  • Download the PKGBUILD file. To extract and install it, enter the makepkg -s --install command line.

Method 3 - Using a DEB file

  • To verify the downloaded Bridge file, use the sudo apt-get install debsig-verify debian-keyring command.
  • Now, download the bridge_pubkey.gpg (public key) on the Linux computer.
  • To import the public key into keyring, use the following command lines.
  • gpg --dearmor --output debsig.gpg bridge_pubkey.gpg
  • sudo mkdir -p /usr/share/debsig/keyrings/E2C75D68E6234B07
  • sudo mv debsig.gpg /usr/share/debsig/keyrings/E2C75D68E6234B07
  • Download and install the policy file.
  • To check a deb file, enter the debsig-verify protonmail-bridge_1.2.6-1_amd64.deb command.
  • Wait until you see the following message.
  • debsig: Verified package from 'Proton Technologies AG (ProtonMail Bridge Linux developers) ' (Proton Technologies AG)
  • Now, you have to install the package by using the sudo apt-get install ./protonmail-bridge_1.2.6-1_amd64.deb command.
  • After verifying the downloaded ProtonMail Bridge for Linux file, go to the next step.

Step 3 - Add your ProntonMail to Bridge

  • Open the ProntonMail Bridge application and click the Add Account option.
  • Provide your ProtonMail account login credentials in the appropriate fields correctly.
  • Once done, get the IMAP/SMTP credentials for configuring your email account in any email client.

Step 4 - Configure your ProntonMail account in Thunderbird

  • Close the ProtonMail Bridge Linux application.
  • Open the Thunderbird email client on the Linux computer.
  • Right-click anywhere in the left panel.
  • Select the Settings option.
  • Navigate to the Account Actions drop-down menu and choose the Add Mail Account option.
    Add Mail Account
  • Now, type your display name and email address in the Your name and Email address fields, respectively.
  • Enter the ProtonMail bridge password in the Password field and click the Done button.
    ProtonMail bridge password
  • If you see the Thunderbird failed to find the settings for your email account message, fill the following fields manually.


  • Server hostname -
  • Port - 1143
  • Authentication - Normal password


  • Server hostname -
  • Port - 1025
  • Authentication - Normal password

**Note: Username for both incoming and outgoing sections must be the same.

Username for both incoming and outgoing
  • Click the Confirm Security Exception button.
    Confirm Security Exception
  • Now, you can access your ProtonMail emails.
  • Make sure to configure your draft settings manually.
  • From now on, ProtonMail Bridge Linux will encrypt all the emails that you send from your account.
mail settings net