K-9 Mail

com.fsck.k9
by Zapstore _@zapstore.dev

Republished from GitHub / F-Droid by the Zapstore main account.

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 https://forum.k9mail.app **Want to help?** K-9 Mail is now part of the Thunderbird family and remains 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 https://github.com/thunderbird/thunderbird-android We're always happy to welcome new developers, designers, documenters, translators, bug triagers and friends.

First release: Feb 10, 2026, 6 total releases.

Most recent release: Sep 22, 2026.

Website Repo

Appears in 0 app stacks.

0 sats / 0 zaps received in the past year.

Sats Received

Underlying data available via MCP: app_zaps, app_releases.

Zap Count

Underlying data available via MCP: app_zaps, app_releases.

Releases

  • Sep 22, 2026 23.1
    Fixed: - Attachment filenames with non-ASCII characters were incorrectly decoded and saved (#11508) Contributors: * Thanks to: @aindriu80, @AvikMakwana, @chrisdebian, @Coding-Young, @coreycb, @dani-zilla, @danielcoderman, @Fjoerfoks, @Friese2001, @harshasiddartha, @helakostain, @ibrahim-iqbal, @itsSiide, @joshua-grimmett, @khaledhaltam, @Klofutar, @kryoseu, @Logeshsharma, @Matthaiks, @mohitsatr, @mvanhorn, @oersen, @rafaeltonholo, @ramses-70, @rprys, @schorschii, @shamim-emon, @Shaurya2k06, @snowykte0426, @solokot, @taljeon, @wmontwe New Contributors: * @mvanhorn made their first contribution in #11248 * @AvikMakwana made their first contribution in #11301
    More…
    * @ibrahim-iqbal made their first contribution in #11309 * @ramses-70 made their first contribution in #11389 * @harshasiddartha made their first contribution in #11371 * @chrisdebian made their first contribution in #11406 * @danielcoderman made their first contribution in #11432 * @Logeshsharma made their first contribution in #11460 * @taljeon made their first contribution in #11571 **Full Changelog**: https://github.com/thunderbird/thunderbird-android/compare/K9MAIL_23_0...K9MAIL_23_1
  • Aug 3, 2026 21.1
    Fixed: - Could not empty the Trash folder using the Empty Trash action (#11255, #11256) Contributors: Thanks to: @arpitagarwal1301, @coreycb, @dani-zilla, @frabera, @himu-gupta, @mohitsatr, @mvanhorn, @rafaeltonholo, @saisafe, @shamim-emon, @stephenking314, @TusharBhatia34, @wmontwe New Contributors: * @mvanhorn made their first contribution in #11003 * @TusharBhatia34 made their first contribution in #11227
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    * @arpitagarwal1301 made their first contribution in #11280 **Full Changelog**: https://github.com/thunderbird/thunderbird-android/compare/K9MAIL_21_0...K9MAIL_21_1
  • Jun 23, 2026 20.0
    New: - Enable easily discoverable way to configure and use Thundermail (#11086) Changed: - Only show message notification configuration actions above the cutoff (#10301) Fixed: - Account drawer stayed open after account switch despite auto-select Inbox setting (#10120)
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    - Imported settings could incorrectly show 'XX' avatar monogram (#10958) - Printed emails omitted message headers and used minimal margins (#10567) - Compose button did not work in tablet split-screen message view (#10753) - Accented subfolder names sorted to bottom instead of locale order (#10718) - Disabled font size setting appeared in General Settings search (#10756) - New mail notifications showed avatars when contact pictures were disabled (#10750) - Mail opening still used fade-in after animations were disabled (#1903) - Sidebar account-switching animations were too fast (#10480) Contributors: Thanks to: @Alecaddd, @coreycb, @dandarnell, @dani-zilla, @frabera, @harshad1, @jasi381, @jim-daf, @jondaley, @kryoseu, @mohitsatr, @mvanhorn, @numericOverflow, @rafaeltonholo, @saisafe, @shamim-emon, @stephenking314, @untitaker, @varshilsoni, @winne42, @wmontwe New Contributors: * @Alecaddd made their first contribution in #10793 * @jondaley made their first contribution in #10862 * @saisafe made their first contribution in #10932 * @kryoseu made their first contribution in #10997 * @jim-daf made their first contribution in #11030 * @numericOverflow made their first contribution in #11032 * @varshilsoni made their first contribution in #11081 **Full Changelog**: https://github.com/thunderbird/thunderbird-android/compare/K9MAIL_19_2...K9MAIL_20_0
  • May 26, 2026 19.0
    New: - Message notification actions can be configured (#3530) - Message font size scales with device preferences (#10692) - Integrate an easily discoverable way to configure and use Thundermail (#10866, #10958, #10994) Fixed: - Thunderbird crashed on Android 8 when fetching images (#10721) - Accidental swipe in message viewer marked unread email as read (#10747)
  • Mar 17, 2026 17.0
    New: - Account avatar customization (#10335) - Foldable device support with split-screen (#9760) - Email messages can be printed (#10216) - Unified folder account indicator identifies message ownership (#10083) - Display account avatar in message notifications (#7089) Fixed: - Edge-to-edge regressions affected account setup screens (#10214, #10235, #10257)
    More…
    - Tap behavior was unreliable in recipient fields (#10367) - Incorrect icon was displayed for 'Find folder' (#10271) - Device orientiation change duplicated recipient field text (#10288) - Copied link text incorrectly included CSS (#10115) - Unselecting 'Colorize contact pictures' setting did not persist (#9630) - Some general settings were not preserved after export and import (#10149)
  • Feb 10, 2026 16.1
    Fixed: - Messages containing complex CSS could be unreadable (#10497) - Deleted/read messages in unified inbox may not update until manual refresh (#10243) Contributors: - Thanks to @rafaeltonholo Full Changelog: https://github.com/thunderbird/thunderbird-android/compare/K9MAIL_16_0...K9MAIL_16_1