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linagora/tmail-flutter

A multi-platform Flutter email client for Android, iOS and web that reads mail through the JMAP protocol.

Open-source alternative to:Gmail

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What is it?

Twake Mail (tmail-flutter) is an email client built with Flutter that runs on mobile devices and the web. It connects to mail servers using JMAP, a modern HTTP and JSON-based protocol designed as an alternative to IMAP, and is aimed at the Twake Mail back-end developed by Linagora.

The app covers the core email workflow: reading mailboxes and messages, managing them, sending email, and searching. Screenshots in the project show phone and tablet layouts, and a web version is built from the same codebase and can be deployed as a Docker image with a configurable JMAP server URL.

The project also ships a JMAP Dart client library that developers can reuse to build their own JMAP-based applications. The project is licensed under AGPL-3.0.

Key features

  • 01Reads and manages mailboxes and messages over the JMAP protocol
  • 02Sends email and searches messages
  • 03Runs on Android, iOS and web from a single Flutter codebase
  • 04Layouts adapt to phone and tablet screen sizes
  • 05Web version can be deployed with Docker and works with any JMAP server

Use cases

  • Using a self-hosted or Twake Mail back-end with a native mobile mail app
  • Deploying a browser-based webmail frontend for a JMAP server
  • Building a custom JMAP email client using the bundled Dart library

Quick start

  1. 1

    Go to the project root folder

  2. 2

    Run the prebuild script

    /bin/bash scripts/prebuild.sh
  3. 3

    Build the Android app

    flutter build apk

Things to know

  • Mail reading requires a JMAP server, such as the Twake Mail backend or another JMAP-compatible server.
  • The web app is described by its authors as still in early development.
  • Licensed under AGPL-3.0, a copyleft license with network-use obligations.

In collections

Android apps & phone tools

Topics

#email#flutter#jmap#mobile#webmail#dart#hacktoberfest

FAQ

What is tmail-flutter?
A multi-platform Flutter email client for Android, iOS and web that reads mail through the JMAP protocol. Twake Mail (tmail-flutter) is an email client built with Flutter that runs on mobile devices and the web. It connects to mail servers using JMAP, a modern HTTP and JSON-based protocol designed as an alternative to IMAP, and is aimed at the Twake Mail back-end developed by Linagora.
Is tmail-flutter free to use? What license does it have?
tmail-flutter is open source under the AGPL-3.0 license. Check the license terms before using it in commercial products.
Is tmail-flutter still maintained?
Actively maintained. The last commit to tmail-flutter was on Nov 6, 2026.
What can I use tmail-flutter for?
Using a self-hosted or Twake Mail back-end with a native mobile mail app Deploying a browser-based webmail frontend for a JMAP server Building a custom JMAP email client using the bundled Dart library
How do I install tmail-flutter?
Go to the project root folder Run the prebuild script: /bin/bash scripts/prebuild.sh Build the Android app: flutter build apk
Where can I get tmail-flutter?
The source code and installation instructions are on GitHub: https://github.com/linagora/tmail-flutter

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