K-9 will supplement the Thunderbird experience and enhance where and how users are able to have a great email experience. “Many Thunderbird users have asked for a Thunderbird experience on mobile, which we intend to provide by helping make K-9 amazing (and turning it into Thunderbird on Android). In 2022, the two have decided that rather than Thunderbird developing its own app from scratch, K-9 should simply join Thunderbird.

With new features such as OpenPGP end-to-end encryption and a long-awaited mobile app, the Thunderbird project was able to forge its own path.Īccording to the Thunderbird team, discussions began in 2018 between Thunderbird product manager Ryan Lee Sipes and K-9’s lead maintainer Christian Ketterer about a possible collaboration for a Thunderbird email app. Thunderbird was moved to the Mozilla Foundation’s subsidiary MZLA Technologies Corporation two years ago, in a similar ownership structure to Firefox under the foundation’s subsidiary, Mozilla Corporation.

Thunderbird, the open source email client, is coming to Android via the K-9 Mail Android email app project, which is merging with Thunderbird to form the Thunderbird Android email app.

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