Premium
Download K-9 Mail 5.004 APK
Target: Android 4.2 (Jelly Bean MR1, API 17)
What's new in K-9 Mail 5.004
From version 4.009:
- 'Auto-fit messages' setting did not persist
- Edge-to-edge move/copy regressed with 3-button nav
- Swiping message left/right could abort prematurely
- Outlook SMTP failed authentication for some accounts
- Gmail folder prefixes appeared after refreshing folder list
- Quiet time preferences were ignored
- Thunderbird could crash after deleting an account
About K-9 Mail 5.004
From version 20.1:
Premium
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 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.
K-9 Mail 5.004 variants
This release may come in several variants. Consult our handy FAQ to see which download is right for you.
Version:20.1
Uploaded:July 9, 2026 at 10:32AM UTC
File size:10.11 MB
Version:5.007(22007) for Android 4.0.3+ (Ice Cream Sandwich MR1, API 15)
Uploaded:December 14, 2015 at 7:58PM UTC
File size:2.93 MB
Downloads:681
Version:5.006(22006) for Android 4.0.3+ (Ice Cream Sandwich MR1, API 15)
Uploaded:June 9, 2015 at 3:56PM UTC
File size:2.93 MB
Downloads:346
Version:5.105(23050) for Android 4.0.3+ (Ice Cream Sandwich MR1, API 15)
Uploaded:March 16, 2015 at 9:27PM UTC
File size:3.70 MB
Downloads:2,973
Version:5.004(22004) for Android 4.0.3+ (Ice Cream Sandwich MR1, API 15)
Uploaded:March 13, 2015 at 9:29PM UTC
File size:2.93 MB
Downloads:943
Version:20.1
Uploaded:July 9, 2026 at 2:02PM UTC
File size:10.57 MB
Downloads:37
Version:20.0
Uploaded:June 23, 2026 at 2:13AM UTC
File size:10.11 MB
Downloads:52
Version:19.2
Uploaded:June 5, 2026 at 1:37AM UTC
File size:10.56 MB
Downloads:57
Version:19.0
Uploaded:May 29, 2026 at 12:34AM UTC
File size:10.05 MB
Downloads:35
Version:18.0
Uploaded:April 19, 2026 at 4:14PM UTC
File size:9.94 MB
Downloads:119
Version:17.0
Uploaded:March 24, 2026 at 1:32PM UTC
File size:14.01 MB
Downloads:77
Version:16.1
Uploaded:February 28, 2026 at 6:54PM UTC
File size:13.36 MB
Downloads:140
Version:16.0
Uploaded:February 3, 2026 at 6:14PM UTC
File size:13.36 MB
Downloads:89
Version:15.0
Uploaded:January 12, 2026 at 3:40PM UTC
File size:13.29 MB
Downloads:61
Version:14.0
Uploaded:December 20, 2025 at 7:58AM UTC
File size:12.93 MB
Downloads:106
