

The Bridge essentially acts like a local email server (using the IMAP and SMTP protocols) and interacts with email clients also installed locally on your desktop computer. The Bridge is an app that you download and install locally on your desktop or laptop computer and it runs automatically in the background.

Use email like you have always used it, and the Bridge will automatically encrypt and decrypt messages in the background. The best part is that this does not require modifying your email client or making changes to your existing workflow. In a single sentence, ProtonMail Bridge is an application that allows you to use your ProtonMail encrypted email account with your favorite desktop email client such as Thunderbird, Apple Mail, or Outlook, while simultaneously retaining the zero-access encryption and end-to-end encryption that ProtonMail provides.

Today, we are finally ready to present ProtonMail Bridge. Desktop systems encompass multiple operating systems with dozens of popular email clients with their own adherents, and virtually none of them natively speak PGP, the email encryption standard upon which ProtonMail is built.Īround two years ago, we created a small task force to tackle this challenge. However, one of our goals has always been to bring easy-to-use encrypted email to desktop. In the years since, we have made many great strides towards creating usable encrypted email, first with ProtonMail’s webmail interface and then with our award-winning iOS and Android secure email apps.
