• Major redesign of the user interface
  • Changed periodic background sync and push implementations to work much more reliably
  • Deprecated support for the WebDAV protocol; new accounts can no longer be added
  • K-9 Mail now requires Android 5.0 and newer
  • Added support for Autocrypt setup message
  • Added support for encrypted subjects
  • Don't use default signature when setting up a new account
  • Allow installation on external media (Android 6+ with adopted storage)
  • Removed keyboard shortcuts for menu items; on some devices they conflicted with system shortcuts
  • Removed the broken option to store the message database on external storage
  • Removed the 'remote control' interface third-party apps could use to change some settings in K-9 Mail
  • A lot of other bug fixes, internal changes, and improvements
  • Check out the changelog entries for 5.7xx versions for a lot more details

The forum thread for this release: https://forum.k9mail.app/t/k-9-mail-is-back-5-800-release/1164

K-9 Mail is an open source email client that works with basically every email provider.

Features

* supports multiple accounts
* Unified Inbox
* privacy-friendly (no tracking whatsoever, only connects to your email provider)
* automatic background synchronization or push notifications
* local and server-side search
* OpenPGP email encryption (PGP/MIME)

Install the app "OpenKeychain: Easy PGP" to encrypt/decrypt your emails using OpenPGP.

Support

If you're having trouble with K-9 Mail, ask for help in our support forum at forum.k9mail.app

Want to help?

K-9 Mail is a community developed project. If you're interested in helping to improve the app, please join us! You can find our bug tracker, source code, and wiki at github.com/k9mail/k-9
We're always happy to welcome new developers, designers, documenters, translators, bug triagers and friends.

See available downloads
A more recent upload may be available below!
Download

This release may come in several variants. Consult our handy FAQ to see which download is right for you.

Variant
Arch
Version
DPI
5.800 APK
28000
July 24, 2021
noarch
Android 5.0+
nodpi
All Releases
K-9 Mail 6.504 beta
January 27, 2023

Version:6.504

Uploaded:January 27, 2023 at 3:41PM UTC

File size:7.86 MB

Downloads:73

K-9 Mail 6.503 beta
January 20, 2023

Version:6.503

Uploaded:January 20, 2023 at 6:30AM UTC

File size:7.86 MB

Downloads:52

K-9 Mail 6.502 beta
January 18, 2023

Version:6.502

Uploaded:January 18, 2023 at 6:01AM UTC

File size:7.6 MB

Downloads:37

K-9 Mail 6.501 beta
January 10, 2023

Version:6.501

Uploaded:January 10, 2023 at 2:04PM UTC

File size:7.6 MB

Downloads:45

K-9 Mail 6.400
November 29, 2022

Version:6.400

Uploaded:November 29, 2022 at 6:07AM UTC

File size:7.61 MB

Downloads:138

K-9 Mail 6.311 beta
November 2, 2022

Version:6.311

Uploaded:November 2, 2022 at 5:51AM UTC

File size:7.58 MB

Downloads:91

K-9 Mail 6.310 beta
October 27, 2022

Version:6.310

Uploaded:October 27, 2022 at 6:11AM UTC

File size:7.58 MB

Downloads:33

K-9 Mail 6.309 beta
October 12, 2022

Version:6.309

Uploaded:October 12, 2022 at 8:11PM UTC

File size:7.57 MB

Downloads:65

K-9 Mail 6.308 beta
October 6, 2022

Version:6.308

Uploaded:October 6, 2022 at 7:06PM UTC

File size:7.55 MB

Downloads:55

K-9 Mail 6.307 beta
September 26, 2022

Version:6.307

Uploaded:September 26, 2022 at 10:22PM UTC

File size:7.55 MB

Downloads:52

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