K-9 Mail24.0 - Google Play
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Publisher Description
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
* 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.
About K-9 Mail
The company that develops K-9 Mail is Mozilla Thunderbird. The latest version released by its developer is 24.0.
To install K-9 Mail on your Android device, just click the green Continue To App button above to start the installation process. The app is listed on our website since 2026-10-05 and was downloaded 0 times. We have already checked if the download link is safe, however for your own protection we recommend that you scan the downloaded app with your antivirus. Your antivirus may detect the K-9 Mail as malware as malware if the download link to com.fsck.k9 is broken.
How to install K-9 Mail on your Android device:
- Click on the Continue To App button on our website. This will redirect you to Google Play.
- Once the K-9 Mail is shown in the Google Play listing of your Android device, you can start its download and installation. Tap on the Install button located below the search bar and to the right of the app icon.
- A pop-up window with the permissions required by K-9 Mail will be shown. Click on Accept to continue the process.
- K-9 Mail will be downloaded onto your device, displaying a progress. Once the download completes, the installation will start and you'll get a notification after the installation is finished.
Program Details
System requirements
Download information
Pricing
Version History
version 24.0
posted on 2026-10-05
K-9 Mail version 24.0
New:
- Signatures support HTML
- Reply offers Reply or Reply All
Changed:
- Long account names fit in two lines
Fixed:
- Compose selection invisible in light theme
- Status icons unreadable when selecting messages
- Recipient expander failed to collapse after edit
- Camera attachments could crash the app
- Save All saved each attachment with same file content
- HTML signatures could disappear after rotation
- Edit as new used wrong identity for queued mail
version 24.0
posted on 2026-10-05
K-9 Mail version 24.0
New:
- Signatures support HTML
- Reply offers Reply or Reply All
Changed:
- Long account names fit in two lines
Fixed:
- Compose selection invisible in light theme
- Status icons unreadable when selecting messages
- Recipient expander failed to collapse after edit
- Camera attachments could crash the app
- Save All saved each attachment with same file content
- HTML signatures could disappear after rotation
- Edit as new used wrong identity for queued mail
version 23.1
posted on 2026-09-22
K-9 Mail version 23.1
Fixed:
- Attachment filenames with non-ASCII characters were incorrectly decoded and saved
version 23.0
posted on 2026-09-09
K-9 Mail version 23.0
Fixed:
- Signature field only accepted single-line text in Composition defaults
version 22.0
posted on 2026-08-10
K-9 Mail version 22.0
New:
- Incognito Keyboard privacy setting
- Thundermail interim screen when adding account
Changed:
- Selected sort option now shows indicator in sort menu
Fixed:
- Messages could scroll horizontally when content fit screen
- Thread deletion confirmation incorrectly said only one message would be deleted
- Notification actions difficult to scroll/reorder on small screen
- Show Headers collapsed multi-line email headers into single line
version 21.1
posted on 2026-08-03
K-9 Mail version 21.1
Fixed:
- Could not empty the Trash folder using the Empty Trash action
version 20.1
posted on 2026-07-20
K-9 Mail version 20.1
Fixed:
- Application could crash when rendering long messages
- Application could crash due to memory exhaustion
version 20.0
posted on 2026-06-22
K-9 Mail version 20.0
New:
- Enable easily discoverable way to configure and use Thundermail
Changed:
- Only show message notification config actions above the cutoff
Fixed:
- Account drawer stayed open after account switch despite auto-select Inbox setting
- Imported settings could incorrectly show 'XX' avatar monogram
- Printed emails omitted message headers and used minimal margins
- Compose button did not work in tablet split-screen message view
version 19.2
posted on 2026-06-04
K-9 Mail version 19.2
Fixed:
- K-9 Mail crashed when scanning Thundermail QR code
version 19.0
posted on 2026-05-26
K-9 Mail version 19.0
New:
- Message notification actions can be configured
- Message font size scales with device preferences
- Integrate an easily discoverable way to configure and use Thundermail
Fixed:
- Thunderbird crashed on Android 8 when fetching images
- Accidental swipe in message viewer marked unread email as read
Disclaimer
Official Google Play Link
We do not host K-9 Mail on our servers. We did not scan it for viruses, adware, spyware or other type of malware. This app is hosted by Google and passed their terms and conditions to be listed there. We recommend caution when installing it.
The Google Play link for K-9 Mail is provided to you by apps112.com without any warranties, representations or guarantees of any kind, so access it at your own risk.
If you have questions regarding this particular app contact the publisher directly. For questions about the functionalities of apps112.com contact us.
