K-9 Mail – Advanced Email for Android 📧
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Latest commit 300076c Sep 13, 2018
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.github Adjust the language slightly Aug 30, 2017
.tx Add new translations Oct 27, 2017
app Simplify NotificationActionCreator interface Sep 12, 2018
backend Hide 'upload sent messages' setting when Backend doesn't support uploads Sep 4, 2018
config Disable some FindBugs checks (2) Feb 28, 2017
docs Use HTTPS in bit.ly - works even though bit.ly generate HTTP links by… Jan 13, 2018
gradle Update to Gradle 4.7 May 23, 2018
images Add navigation drawer for faster folder switching May 25, 2018
mail Remove unused method Message.clone() Sep 2, 2018
plugins Fix unresolved references in Javadoc comments Sep 2, 2018
tools Remove (inactive) legacy emoji support Jan 29, 2018
.gitattributes Force gradlew (and other shell scripts) to use lf line endings. Dec 4, 2014
.gitignore Exclude DS_Store Sep 2, 2017
.gitmodules Kill our use of submodules dead. They're too painful for new contribu… Nov 24, 2012
.travis.yml Update compileSdkVersion to 27 Feb 17, 2018
LICENSE Fix LICENSE on GitHub (#1712) Oct 12, 2016
NOTICE Fix LICENSE on GitHub (#1712) Oct 12, 2016
README.md Change Tester links to go directly to Google Play Sep 9, 2017
build.gradle Clean up modules' dependencies Jul 8, 2018
gradle.properties Move dependency versions from gradle.properties to build.gradle May 23, 2018
gradlew Update Gradle to 4.5.1 Feb 17, 2018
gradlew.bat Update build tools, Gradle version + wrapper, Android plugin Oct 5, 2016
proguard.cfg Remove ActionBarSherlock Jun 21, 2014
settings.gradle Add interface for detection of encrypted messages Sep 2, 2018


K-9 Mail

Build Status Join the chat

K-9 Mail is an open-source email client for Android.


K-9 Mail can be downloaded from a couple of sources:

You might also be interested in becoming a tester to get an early look at new versions.

Release Notes

Check out the Release Notes to find out what changed in each version of K-9 Mail.

Need Help?

If the app is not behaving like it should, you might find these resources helpful:


Interested in helping to translate K-9 Mail? Contribute here:



A re-design is underway. You can contribute, view updates and access design files here:



Please fork this repository and contribute back using pull requests.

Any contributions, large or small, major features, bug fixes, unit/integration tests are welcomed and appreciated but will be thoroughly reviewed and discussed. Please make sure you read the Code Style Guidelines.


Aside from discussing changes in pull requests and issues we use the following communication services:


Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at


Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
See the License for the specific language governing permissions and
limitations under the License.


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