ProtonMail launches support for encrypted email on Outlook and Apple Mail.

December 6, 2017
Geneva, Switzerland

What is ProtonMail Bridge

ProtonMail Bridge is an innovative application designed to revolutionize encrypted email. After nearly two years of research and development, the company has solved one of the longstanding obstacles that has prevented the widespread adoption of encrypted email, that is, the need for end-user retraining and email behavior changes that usually lead to a loss in productivity.

“The ProtonMail Bridge is literally a bridge between the unencrypted and encrypted worlds in the sense that it allows your average user to benefit from the added security and privacy of end-to-end encryption without having to make any changes to their email usage behavior.” says ProtonMail co-founder Dr. Andy Yen, “This means email encryption is no longer limited to just the tech savvy and advanced users.”

The software acts as a layer between desktop email clients and ProtonMail’s encrypted email servers, handling all aspects of encryption, decryption, and key management in a way that is completely transparent to the end user. For the first time ever, it is possible to use encrypted email with Microsoft Outlook, Thunderbird, and Apple Mail without needing to install plugins, extensions, or make other modifications to users’ desktop email clients. The power of this approach is that users can continue to use email as they always have, without needing to make any changes to their existing workflow in order to use end-to-end encryption.

By conducting the encryption and decryption in a middleware between email servers and the user’s email client, the ProtonMail Bridge also enables full-text search of encrypted messages for the first time ever, as the native search capabilities of desktop email clients can be used without compromising the encryption.

“Over the past 3 years, we have built some of the world’s most useful encryption technologies that protect millions worldwide, but the ProtonMail Bridge is certainly the most innovative one, and the one that will have the most far-reaching impact,” says Dr. Yen, “Today’s launch accomplishes one of our long-standing goals of bringing security technology to the mainstream.”

For now, the ProtonMail Bridge officially supports Microsoft Outlook, Thunderbird, Apple Mail, although it can work with any IMAP/SMTP email client. The ProtonMail Bridge is currently available for Windows and MacOS, with a Linux version coming in early 2018.

For more details about ProtonMail Bridge, please refer to our launch blog post here.

ProtonMail’s media kit can be found here.

ProtonMail Bridge images can be found here.

About ProtonMail

ProtonMail is headquartered in Geneva, Switzerland, near CERN (the European Organization for Nuclear Research) where the founding team met in 2013. Every day, the ProtonMail team, brought together by a shared vision of protecting civil liberties, works to advance Internet security and privacy. Since its inception, ProtonMail’s infrastructure has been located exclusively in Switzerland, under the protection of some of the world’s strongest privacy laws.

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About the Author

Irina M

Irina is part of ProtonMail's communication team. With a background in graphic design and digital communications, she strongly supports the protection of private data and wishes to help build a safer internet for generations to come.


Comments are closed.

9 comments on “ProtonMail launches support for encrypted email on Outlook and Apple Mail.

  • Really frustrating that there’s still no Linux.
    I’ve been a paying member for years. I’m sick of using the webmail client.

    • We are sorry for the inconvenience! ProtonMail Bridge will be available for Linux user in Spring of 2018. We will try to make it even sooner.

      • Very troubling you’re prioritizing the convenience of Windows and Mac users enough to dismiss the only privacy oriented OS for that length of time.

      • How are you going to do that, knowing that the majority of us (GNU-Linux users) don’t use Mozilla Thunderbird but email clients alternative like Claws Mail, Kmail, etc?

      • And I’m not very excited about having to install an external application that will always run in the background on my system like you did for Windows/Apple, without any audit by the security team of my GNU-Linux operating system.

  • Many of the praising comments here on “Bridge” and “Protonmail” seem to be a promotional comments made by its staff members.

    • That is incorrect. Every person here with a ProtonMail address is a ProtonMail user, and not a staff member. I am the only staff member here alongside the Admin account.

      • “That is incorrect. Every person here with a ProtonMail address is a ProtonMail user” — Irina M

        So where are my two critical comments/questions (#comment-15348 and #comment-15349) that I have done yesterday as a ProtonMail user with my ProtonMail address?

        They are legitimate concerns/questions even if you (or the moderator) seems to have decided the contrary…

  • Well, for what it’s worth, I think this is terrific. The web interface is fine but not amazing, and since I switched from Google, despite being privacy-conscious I’ve struggled with the loss of some features (like not being able to search for text in the body of an e-mail). I just switched over today and so far has been quite smooth. Hello from a fellow Geneva resident :)