Proton Mail Bridge

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With Proton Mail Bridge, you can access your Proton Mail emails using your regular desktop email client while maintaining secure encryption.

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Occasionally, we'll release versions of our software that are required for all users.

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4. Common issues and questions

Access to your account may be limited if you exceed the Proton free plan limits.

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New Outlook's unexpected changes have made it technically incompatible with Proton Mail Bridge. Here's how to navigate the issue.

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In this guide, we show you how to fix the ”Internal error” synching warning on Proton Mail Bridge.

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In this guide, we show you how to fix a “can't move cache” error on Proton Mail Bridge.

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In this guide, we show you how to fix the “IMAP Login failed” error on Proton Mail Bridge.

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4. Common issues and questions

Learn how to fix a Proton Mail Bridge warning after you’ve changed your Proton Account email addresses.

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4. Common issues and questions

f you see the “cannot access keychain error”, Bridge has failed to access your keychain and therefore can’t decrypt your emails.

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4. Common issues and questions

Learn how to fix common issues when connecting email clients like Thunderbird, Outlook, and Apple Mail to Proton Mail using Bridge.

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How to fix some common login errors you might run into when logging in to Proton Mail Bridge Linux.

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Proton Mail Bridge uses ports 1143 and 1025 by default, but sometimes they are already in use. Learn how to change ports for Bridge.

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4. Common issues and questions

Learn why you may get a password error message while setting up Proton Mail Bridge to connect your email client to Proton Mail.

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4. Common issues and questions

In Thunderbird, you may receive a “connection to server timed out” error when sending or receiving a message. You may be able to prevent this error by increasing the length of time the email client will wait for a response from the server.

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4. Email app configuration

How to set up Mozilla Thunderbird with Proton Mail Bridge in Windows, macOS, and Linux.

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4. Email app configuration

Setup guide for configuring Outlook, Thunderbird, and Apple Mail email clients for use with Proton Mail Bridge in Windows, macOS, and Linux.

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4. Email app configuration

How to configure Apple Mail for macOS to use Proton Mail Bridge

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4. Email app configuration

Proton Mail Bridge integrates Proton Mail with IMAP and SMTP email clients. We've optimized Bridge for Thunderbird, Apple Mail, and Outlook.

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4. Installation on Linux

When Proton Mail Bridge is running you should see an icon for it in the Linux system tray. If you don’t, follow these instructions.

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4. Installation on Linux

We explain how you can install our Proton Mail Bridge command line tool for Linux using a Debian software package.

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4. Installation on Linux

This article explains how to verify and install an RPM package on your Linux device.

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4. Installation on Linux

This article explains how to verify and install the DEB package on your Linux device.

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4. Installation on Linux

For your security, we advise you verify the Bridge software you downloaded came from Proton Mail. Our short guide explains how to do that.

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4. Installation on Linux

This article explains how to verify and install an PKGBUILD package on your Linux device.

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4. Installation on Linux

Proton Mail Bridge for Linux enables you to integrate your Proton Mail account with IMAP and SMTP email clients like Thunderbird and Evolution.

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4. Installation on macOS

We explain what Apple Mail requires you to confirm our self-signed certificate before it will accept it.

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4. Installation on macOS

We explain why you may see a warning when you install the Proton Mail Bridge profile on macOS.

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4. Installation on macOS

Learn how to set up the new Outlook app for macOS with Proton Mail Bridge to send and receive mail from your Proton Mail account.

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4. Installation on macOS

How to configure Microsoft Outlook 2019 for macOS to use Proton Mail Bridge.

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4. Installation on macOS

How to configure Microsoft Outlook 2016 for macOS to use Proton Mail Bridge

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4. Installation on macOS

How to configure Microsoft Outlook 2011 for macOS to use Proton Mail Bridge.

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4. Installation on Windows

How to configure Microsoft Outlook 2019 for Windows to use Proton Mail Bridge

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4. Installation on Windows

How to configure Microsoft Outlook 2016 for Windows to use Proton Mail Bridge

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4. Installation on Windows

How to configure Microsoft Outlook 2013 for Windows to use with Proton Mail Bridge.

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4. Introduction to Bridge

Learn how to install Proton Mail Bridge to use third-party email clients like Outlook, Thunderbird, and Apple Mail with Proton Mail.

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4. Introduction to Bridge

Proton Mail Bridge is supported on Windows 10+ (64 bit), macOS 10.5 (Catalina)+, and Linux with DEB, RPM, and PKGBUILD packages.

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4. Introduction to Bridge

Proton Mail Bridge allows you to integrate your inbox with most mail clients that support IMAP and SMTP protocols.

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4. Using Bridge

Proton Mail Bridge usually updates automatically in the background. Learn how to update it manually if it doesn’t.

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4. Using Bridge

The Bridge app will automatically download and install updates, ensuring that you are always using the latest version. You can also turn this feature off.

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4. Using Bridge

We created a comprehensive guide for our Bridge command line tool for Linux. It lists all the most important commands and explains what they do.

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4. Using Bridge

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4. Using Bridge

Messages exchanged between Proton Mail accounts via Bridge are end-to-end encrypted just like they are in our web and mobile apps.

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4. Using Bridge

The email clients supported by Bridge interpret Proton Mail labels as folders. So when you configure your Proton Mail account with your email client, your existing labels will appear as folders within the Labels folder.

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4. Using Bridge

If you're using Proton Mail with a third-party email client, Proton Mail Bridge can sort multiple addresses into the same folders or different folders.

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4. Using Bridge

The default setting in Bridge is to automatically start when you turn on your computer. In some cases, you may see an error indicating that autostart is not possible due to your computer’s permissions.