FungoApp
K-9 Mail

K-9 Mail

15.0

Mozilla Thunderbird
100.0K ratings5.0M downloads
Third-Party

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

Other versions
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This is third-party app info. Not affiliated with the developer.
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.

Requirements (Latest version)

• Requires Android 5.0 or higher

Information about K-9 Mail 15.0

Basic Information

DeveloperMozilla Thunderbird
LicenseFree
Content RatingEveryone
In-App Purchases$5.00 - $200.00 per item

Developer Contact

Security & Privacy

AdvertisingNo ads

Download Information

Downloads9.5M
Last UpdatedFeb 3, 2026
File TypeAPK

Rating

3.1100.0K ratings
5
35.0K
4
13.3K
3
10.7K
2
10.0K
1
31.0K