K-9 Mail – Advanced Email for Android 📧
Latest commit 47b86f6 Feb 21, 2017 @cketti cketti Merge pull request #2231
Unit tests for SmtpDataStuffing
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.tx Update Transifex client configuration Dec 19, 2014
config Ignore GoogleAppIndexingWarning Feb 13, 2016
docs Tweak Play Store descriptions Dec 5, 2016
gradle Update to Robolectric 3.1.1 and tidy up code Oct 9, 2016
images replace icon with new material design icon Jan 16, 2017
k9mail-library Merge pull request #2231 Feb 21, 2017
k9mail Merge pull request #2220 from k9mail/no-provider Feb 19, 2017
plugins openpgp-setup: move crypto provider to global settings Feb 8, 2017
tools Use https to download SDK Jun 24, 2015
.gitattributes Force gradlew (and other shell scripts) to use lf line endings. Dec 4, 2014
.gitignore Ignore the captures folder - generated by AndroidStudio Jan 29, 2017
.gitmodules Kill our use of submodules dead. They're too painful for new contribu… Nov 24, 2012
.travis.yml Update build tools, Gradle version + wrapper, Android plugin Oct 5, 2016
CONTRIBUTING.md Add first version of guidelines for contributing Aug 29, 2015
LICENSE Fix LICENSE on GitHub (#1712) Oct 12, 2016
NOTICE Fix LICENSE on GitHub (#1712) Oct 12, 2016
README.md Updating links to manual and documentation May 8, 2016
build.gradle Merge pull request #1747 from k9mail/xoauth2Backend Dec 12, 2016
gradle.properties Update robolectric, use Runner classes Feb 5, 2017
gradlew Update build tools, Gradle version + wrapper, Android plugin Oct 5, 2016
gradlew.bat Update build tools, Gradle version + wrapper, Android plugin Oct 5, 2016
issue_template.md Remove formatting from issue template Jan 21, 2017
proguard.cfg Remove ActionBarSherlock Jun 21, 2014
settings.gradle Replace Android-PullToRefresh with android.support SwipeRefreshLayout Nov 20, 2016


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 beta tester or an alpha 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:



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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