## File: README.md # Thunderbird for Android [](https://play.google.com/store/apps/details?id=net.thunderbird.android&referrer=utm_campaign%3Dandroid_metadata%26utm_medium%3Dweb%26utm_source%3Dgithub.com%26utm_content%3Dbadge) [](https://f-droid.org/packages/net.thunderbird.android) [](https://apps.obtainium.imranr.dev/) [](https://github.com/thunderbird/thunderbird-android/releases/latest) [](https://github.com/thunderbird/thunderbird-android/releases) Thunderbird for Android is a powerful, privacy-focused email app. Effortlessly manage multiple email accounts from one app, with a Unified Inbox option for maximum productivity. Built on open-source technology and supported by a dedicated team of developers alongside a global community of volunteers, Thunderbird never treats your private data as a product. Thunderbird for Android is based on K-9 Mail, which comes with a rich history of success and functionality in open source email. ## Download Thunderbird for Android can be downloaded from a couple of sources: - Thunderbird on [Google Play](https://play.google.com/store/apps/details?id=net.thunderbird.android&referrer=utm_campaign%3Dandroid_metadata%26utm_medium%3Dweb%26utm_source%3Dgithub.com%26utm_content%3Dlink) or [F-Droid](https://f-droid.org/packages/net.thunderbird.android) - Thunderbird Beta on [Google Play](https://play.google.com/store/apps/details?id=net.thunderbird.android.beta&referrer=utm_campaign%3Dandroid_metadata%26utm_medium%3Dweb%26utm_source%3Dgithub.com%26utm_content%3Dlink) or [F-Droid](https://f-droid.org/packages/net.thunderbird.android.beta) - [Github Releases](https://github.com/thunderbird/thunderbird-android/releases) - [FFUpdater](https://f-droid.org/packages/de.marmaro.krt.ffupdater/) allows installing the latest versions from ftp.mozilla.org - [Obtainium](https://obtainium.imranr.dev/): Use "Filter release title by regular expression" under "Additional options" with `Thunderbird`. More info in [Complex Obtainium Apps list](https://apps.obtainium.imranr.dev/). By using Thunderbird for Android Beta, you have early access to current development and are able to try new features earlier. Check out the [Release Notes](https://github.com/thunderbird/thunderbird-android/releases) to find out what changed in each version of Thunderbird for Android. The SHA-256 fingerprints for our signing certificates are available in [SECURITY.md](./SECURITY.md#verifying-fingerprints). ## Need Help? Found a bug? Have an idea? Want to chat? If the app is not behaving like it should, or you are not sure if you've encountered a bug: - Check out our [knowledge base](https://support.mozilla.org/products/thunderbird-android) and [frequently asked questions](https://support.mozilla.org/kb/thunderbird-android-8-faq) - Ask a question on our [support forum](https://support.mozilla.org/en-US/questions/new/thunderbird-android) If you are certain you've identified a bug in Thunderbird for Android and would like to help fix it: - File an issue on [our GitHub issue tracker](https://github.com/thunderbird/thunderbird-android/issues) If you have an idea how to improve Thunderbird for Android: - Tell us about and vote on your feature ideas on [connect.mozilla.org](https://connect.mozilla.org/t5/ideas/idb-p/ideas/label-name/thunderbird%20android). - Join the discussion about the latest changes in the [Thunderbird Android Beta Topicbox](https://thunderbird.topicbox.com/groups/android-beta). The Thunderbird Community uses Matrix to communicate: - General chat about Thunderbird for Android and K-9 Mail: [#tb-android:mozilla.org](https://matrix.to/#/#tb-android:mozilla.org) - Development and other ways to contribute: [#tb-android-dev:mozilla.org](https://matrix.to/#/#tb-android-dev:mozilla.org) - Reach the broader Thunderbird Community in the [community space](https://matrix.to/#/#thunderbird-community:mozilla.org) ## Roadmap To learn more about all the wonderful things planned for this year please see our [roadmap](https://github.com/orgs/thunderbird/projects/19/views/1). The core team's day to day activities are additionally tracked in our [sprint board](https://github.com/orgs/thunderbird/projects/20/views/1). ## Contributing We welcome contributions from everyone. - Development: Have you done a little bit of Kotlin? The [CONTRIBUTING](docs/CONTRIBUTING.md) guide will help you get started - Translations: Do you speak a language aside from English? [Translating is easy](https://hosted.weblate.org/projects/thunderbird/thunderbird-android/) and just takes a few minutes for your first success. - We have [a number of other contribution opportunities](https://blog.thunderbird.net/2024/09/contribute-to-thunderbird-for-android/) available. - Thunderbird is supported solely by financial contributions from users like you. [Make a financial contribution today](https://www.thunderbird.net/donate/mobile/?form=tfa)! - Make sure to check out the [Mozilla Community Participation Guidelines](https://www.mozilla.org/about/governance/policies/participation/). ### Engineering Process We use a structured engineering process to propose, decide, and deliver technical changes. This includes: - [Requests for Comments (RFCs)](docs/engineering/rfcs/README.md) for technical direction. - [Technical Designs](docs/engineering/technical-designs/README.md) for implementation details. - [Architecture Decision Records (ADRs)](docs/engineering/adr/README.md) for durable architectural decisions. You can find more information in the [`docs/engineering`](docs/engineering) directory. We encourage team members and contributors to read through our engineering documentation to understand the processes and decisions that have shaped this project so far. ## K-9 Mail In June 2022, [K-9 Mail joined the Thunderbird family](https://k9mail.app/2022/06/13/K-9-Mail-and-Thunderbird.html) as the foundation for Thunderbird on Android. Since then, we’ve been updating both apps to give users the same solid experience, so it’s normal to notice that K-9 Mail and Thunderbird look and feel nearly identical. They’re built on the same code, and that’s intentional. You'll notice some features are selectively enabled for Thunderbird as opposed to K-9 Mail, usually when they are simply a better fit for Thunderbird (like the import from K-9 functionality). If you prefer the robot dog and would like to keep K-9 Mail around, you can find it here: - [K-9 Mail on Google Play](https://play.google.com/store/apps/details?id=com.fsck.k9&utm_source=thunderbird-android-github&utm_campaign=download-section) - [K-9 Mail on F-Droid](https://f-droid.org/packages/com.fsck.k9/) - [K-9 Mail on Obtainium](https://obtainium.imranr.dev/) (use `K-9 Mail` as filter, see [notes](#download) above) ## Forking If you want to use a fork of this project please ensure that you replace the OAuth client setup in the `app-k9mail/src/{debug,release}/kotlin/app/k9mail/auth/K9OAuthConfigurationFactory.kt` and `app-thunderbird/src/{debug,daily,beta,release}/kotlin/net/thunderbird/android/auth/TbOAuthConfigurationFactory.kt` with your own OAuth client setup and ensure that the `redirectUri` is different to the one used in the main project. This is to prevent conflicts with the main app when both are installed on the same device. ## License Thunderbird for Android is licensed under the [Apache License, Version 2.0](LICENSE). --- ## File: docs/README.md # Thunderbird for Android Documentation The latest available documentation is rendered at: [https://thunderbird.github.io/thunderbird-android/docs/latest/](https://thunderbird.github.io/thunderbird-android/docs/latest/)