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Download K-9 Mail 5.710 APK
Supports installation on external storage.
Target: Android 9.0 (Pie, API 28)
What's new in K-9 Mail 5.710
Fixed duplicate message bug after moving a message
Removed keyboard shortcuts for menu items; on some devices they conflicted with system shortcuts
Don't show fullscreen keyboard in landscape mode
Fixed bug where line breaks were ignored when loading draft messages
POP3: Fixed moving deleted messages to the Trash folder
About K-9 Mail 5.710
K-9 Mail is an open source email client with support for multiple accounts, search, IMAP push email, multi-folder sync, flagging, filing, signatures, BCC-self, PGP/MIME & more!
Premium
K-9 supports IMAP, POP3 and Exchange 2003/2007 (with WebDAV).
Install the app "OpenKeychain: Easy PGP" to encrypt/decrypt your emails using OpenPGP.
K-9 is a community developed project. If you're interested in helping to make the most popular open source email client on Android even better, please join us! You can find our bug tracker, source code, mailing list and wiki at github.com/k9mail/k-9
We're always happy to welcome new developers, designers, documenters, bug triagers and friends.
If you're having trouble with K-9, please report a bug at github.com/k9mail/k-9 rather than just leaving a one-star review. We don't mind you telling the world that you're frustrated, but if you use our bug tracker, we have a better chance of fixing whatever's giving you a hard time.
You can find K-9's release notes at: bit.ly/new-k9
(People sometimes call K-9: K9, K9 Mail, K-9 Email, K9 Email, K9 E-Mail, k9mail or k9email.)
K-9 Mail 5.710 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:6.904(39004) for Android 5.0+ (Lollipop, API 21)
Uploaded:June 27, 2024 at 6:08PM UTC
File size:10.01 MB
Downloads:309
Version:6.903(39003) for Android 5.0+ (Lollipop, API 21)
Uploaded:June 24, 2024 at 12:55PM UTC
File size:10.00 MB
Downloads:61
Version:6.902(39002) for Android 5.0+ (Lollipop, API 21)
Uploaded:June 21, 2024 at 3:58PM UTC
File size:10.00 MB
Downloads:59
Version:6.804(38004) for Android 5.0+ (Lollipop, API 21)
Uploaded:June 7, 2024 at 4:18PM UTC
File size:9.75 MB
Downloads:321
Version:6.901(39001) for Android 5.0+ (Lollipop, API 21)
Uploaded:May 15, 2024 at 4:48PM UTC
File size:9.80 MB
Downloads:147
Version:6.900(39000) for Android 5.0+ (Lollipop, API 21)
Uploaded:May 15, 2024 at 2:48PM UTC
File size:9.80 MB
Downloads:24
Version:6.803(38003) for Android 5.0+ (Lollipop, API 21)
Uploaded:May 10, 2024 at 3:13PM UTC
File size:9.75 MB
Downloads:174
Version:6.802(38002) for Android 5.0+ (Lollipop, API 21)
Uploaded:April 5, 2024 at 6:25PM UTC
File size:9.71 MB
Downloads:254
Version:6.801(38001) for Android 5.0+ (Lollipop, API 21)
Uploaded:March 11, 2024 at 1:17PM UTC
File size:9.64 MB
Downloads:214
Version:6.800(38000) for Android 5.0+ (Lollipop, API 21)
Uploaded:February 29, 2024 at 3:50PM UTC
File size:9.61 MB
Downloads:230
Version:20.1
Uploaded:July 9, 2026 at 2:02PM UTC
File size:10.57 MB
Downloads:21
Version:20.0
Uploaded:June 23, 2026 at 2:13AM UTC
File size:10.11 MB
Downloads:51
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:74
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:104
