K-9 Mail 12.1 beta APK Download by Mozilla Thunderbird - APKMirror

AdvertisementRemove ads, dark theme, and more with

Communication

What's new in K-9 Mail 12.1

- Selected/read/unread message states were hard to distinguish visually

Verified safe to install (read more)

Scroll to available downloads

A more recent upload may be available below!

About K-9 Mail 12.1

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

AdvertisementRemove ads, dark theme, and more with

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 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 github.com/thunderbird/thunderbird-android
We're always happy to welcome new developers, designers, documenters, translators, bug triagers and friends.

Show more Show less

K-9 Mail 12.1 screenshots (9)

K-9 Mail 12.1 beta

K-9 Mail 12.1 beta

K-9 Mail 12.1 beta

K-9 Mail 12.1 beta

K-9 Mail 12.1 beta

K-9 Mail 12.1 beta

K-9 Mail 12.1 beta

K-9 Mail 12.1 beta

K-9 Mail 12.1 beta

AdvertisementRemove ads, dark theme, and more with

Download K-9 Mail 12.1

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

Variant

ArchArchitecture

VersionMinimum Version

DPIScreen DPI

12.1 APK
39028
September 9, 2025

universal

Android 5.0+

nodpi

Apps and releases related to K-9 Mail

Related releases

Thunderbird Beta for Testers (f-droid version) 12.1

September 8, 2025

September 8, 2025

Version:12.1

Uploaded:September 8, 2025 at 11:25AM UTC

File size:11.63 MB

Downloads:16

Related apps

Thunderbird Beta for Testers (f-droid version)

Version:19.0

Uploaded:May 29, 2026 at 3:19PM UTC

File size:9.57 MB

AdvertisementRemove ads, dark theme, and more with

All Releases

K-9 Mail 19.0

May 29, 2026

May 29, 2026

Version:19.0

Uploaded:May 29, 2026 at 12:34AM UTC

File size:10.05 MB

Downloads:17

K-9 Mail 18.0

April 19, 2026

April 19, 2026

Version:18.0

Uploaded:April 19, 2026 at 4:14PM UTC

File size:9.94 MB

Downloads:115

K-9 Mail 17.0

March 24, 2026

March 24, 2026

Version:17.0

Uploaded:March 24, 2026 at 1:32PM UTC

File size:14.01 MB

Downloads:69

K-9 Mail 16.1

February 28, 2026

February 28, 2026

Version:16.1

Uploaded:February 28, 2026 at 6:54PM UTC

File size:13.36 MB

Downloads:120

K-9 Mail 16.0

February 3, 2026

February 3, 2026

Version:16.0

Uploaded:February 3, 2026 at 6:14PM UTC

File size:13.36 MB

Downloads:88

K-9 Mail 15.0

January 12, 2026

January 12, 2026

Version:15.0

Uploaded:January 12, 2026 at 3:40PM UTC

File size:13.29 MB

Downloads:60

K-9 Mail 14.0

December 20, 2025

December 20, 2025

Version:14.0

Uploaded:December 20, 2025 at 7:58AM UTC

File size:12.93 MB

Downloads:101

K-9 Mail 13.0

October 21, 2025

October 21, 2025

Version:13.0

Uploaded:October 21, 2025 at 8:56PM UTC

File size:12.34 MB

Downloads:135

K-9 Mail 12.1 beta

September 9, 2025

September 9, 2025

Version:12.1

Uploaded:September 9, 2025 at 5:44AM UTC

File size:12.20 MB

Downloads:63

K-9 Mail 11.1

August 27, 2025

August 27, 2025

Version:11.1

Uploaded:August 27, 2025 at 9:24AM UTC

File size:11.43 MB

Downloads:141

See more uploads...

Comments