ProtonMail Bridge

ProtonMail Bridge is an application available to all paid users that enables the integration of your ProtonMail account with popular email clients, such as Microsoft Outlook, Mozilla Thunderbird, or Apple Mail. Bridge runs in the background by seamlessly encrypting and decrypting messages as they enter and leave your computer. The app is compatible with most email clients supporting IMAP and SMTP protocols.


Email clients such as Outlook, Apple Mail, and Thunderbird do not support encrypted email natively. However, if paired with the ProtonMail Bridge, users can continue to use their favorite email client and normal workflow while enjoying the benefits of encrypted email. The Bridge is a desktop application that serves as a translator between email clients and ProtonMail servers. In one direction, it fetches encrypted emails from ProtonMail servers, decrypts them, and sends the decrypted data to the email clients. In the other direction, it passes commands from the email clients to the ProtonMail servers, such as moving some emails to another folder or sending a new email. The Bridge will automatically encrypt certain data before sending it to ProtonMail servers.

Help with installing, configuring and using the ProtonMail bridge can be found using the links below:





Bridge Feedback Need help? See Frequently Asked Questions.