K-9 Mail

300PSA · Tools

Verified safeOpen source

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5.0

2 reviews

downloads

6.0

android

AI summary

Open source email client supporting multiple accounts with unified inbox, background sync, and OpenPGP encryption via OpenKeychain. Privacy-focused with no tracking. Version 21.1 fixes an Empty Trash action bug.

Generated by AI. May contain inaccuracies.

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About this app

K-9 Mail is an open source email client that can be used with basically all mail service providers.

characteristics

* Support multiple accounts * unified inbox * Privacy friendly (no tracking, only connected to your email service provider) * Automatic background synchronization or push notifications * Local and server-side search * OpenPGP Email Encryption (PGP/MIME)

Install the application OpenKeychain: Easy PGP and use OpenPGP to encrypt/decrypt email.

support

If you are experiencing problems using K-9 Mail, please seek help on our support forum.

Want to help?

K-9 Mail is a community development project. If you are interested in helping improve apps, please join us! You can find our error tracker, source code and wiki here at https://github.com/thunderbird/thunderbird-android. We always welcome new developers, designers, documentarians, translators, testers and friends to join us.

email open source privacy pgp encryption multi-account offline

What's new

v21.1Aug 4, 2026

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 @arpitagarwal1301 made their first contribution in #11280