K-9 Mail icon

Mozilla Thunderbird


10.0


Trusted App

About K-9 Mail

K-9 Mail is a 100% open source, privacy focused email client for Android

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

Features

* s multiple s

* 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.

If you're having trouble with K-9 Mail, ask for help in our 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 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.

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Additional APP Information

Latest Version

Request K-9 Mail Update 10.0

ed by

Mozilla Thunderbird

Requires Android

Android 5.0+

Available on

Get K-9 Mail on Google Play

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What's New in the Latest Version 10.0

Last updated on May 12, 2025

- Server field pre-filled in manual setup
- Add a menu entry to empty the Spam folder
- Update Gmail OAuth client IDs to Thunderbird for Android
- Preserve the tag when sanitizing HTML content
- Messages and star counts in the drawer update instantly
- Hide s setting now ed across restarts
- Restart PushService after app update

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K-9 Mail Screenshots

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