
This move allows Thunderbird users to have a powerful, privacy-respecting email experience today on Android. “Thunderbird users have long been asking for Thunderbird on their Android and iOS devices. Because the app already supports power user features with a shared focus on privacy and open standards, Mozilla acknowledged that taking over the K-9 Mail open source project was the easiest way to bring Thunderbird to Android. The app has a Gmail-like interface and supports every email provider with push IMAP support and unified inboxes. K-9 Mail is a quite popular email client on Android with over 5 million downloads on the Play Store.

Christian Ketterer, the developer and maintainer of K-9 Mail has joined the Thunderbird team and will work on transforming the app into the Android version of Thunderbird. Proton Mail also offers applications for iOS (new window) and Android (new window) for easy access on your mobile device.Mozilla revealed today that the open-source Android email client K-9 Mail will become Thunderbird on Android.

However, this may change in the future to include our Proton Free plan as we develop our infrastructure. Proton Mail Bridge is currently available only if you have a paid Proton Mail plan. You can find Proton Mail Bridge for macOS, Windows, and Linux on the Proton Mail Bridge homepage (new window), along with frequently asked questions and detailed setup instructions for each of the supported clients. This includes support for importing emails into your Proton Mail account from other email accounts that are connected to the same client, as well as full-text search of your Proton Mail emails from within your client. It allows you to fully integrate your Proton Mail account with a third-party client that supports IMAP and SMTP protocols, such as Microsoft Outlook, Mozilla Thunderbird, and Apple Mail. Proton Mail Bridge (new window) is an application that seamlessly encrypts and decrypts your mail as it enters and leaves your computer.
