K-9 Mail APK

Version 6.000 - com.fsck.k9

K-9 Mail is a 100% free and open source email client for Android.

K-9 Mail apk

APP Information

Download Version 6.000 (30000)
Apk Size7.42 MB
App DeveloperK-9 Dog Walkers
Malware CheckTRUSTED
Install on Android5.0 and up
App Packagecom.fsck.k9.apk
Website https://k9mail.github.io/

Download K-9 Mail 6.000 APK

App Description

K-9 Mail is fsck,communication,mail, content rating is Everyone (PEGI-3). This app is rated 4.19 by 43 users who are using this app. To know more about the company/developer, visit K-9 Dog Walkers website who developed it. com.fsck.k9.apk apps can be downloaded and installed on Android 5.0 and higher Android devices. The Latest Version of 6.000 Available for download. Download the app using your favorite browser and click Install to install the application. Please note that we provide both basic and pure APK files and faster download speeds than APK Mirror. This app APK has been downloaded 222085+ times on store. You can also download com.fsck.k9 APK and run it with the popular Android Emulators.

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! 

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 https://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 https://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: http://bit.ly/new-k9

(People sometimes call K-9: K9, K9 Mail, K-9 Email, K9 Email, K9 E-Mail, k9mail or k9email.)

App ChangeLog

  • - Further improvements to encryption user experience
  • - Added ability to forward a message as attachment
  • - Improved the way we display text/plain messages
  • - Improved rendering of right-to-left text
  • - Fixed bug that caused draft messages to be lost
  • - More bug fixes

App Screens

K-9 Mail App Screen 1K-9 Mail App Screen 2K-9 Mail App Screen 3K-9 Mail App Screen 4K-9 Mail App Screen 5K-9 Mail App Screen 6K-9 Mail App Screen 7

Older Versions

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Google Play Reviews

  1. Garthy D-avatar

    Garthy D

    The once mighty K-9 mail has fallen. For many, many years K-9 mail has had me covered. It had its rough edges but there was no reason to look for anything else. It was good. New developer. New redesign. And a whole lot of important features now no longer work or are just that much more harder to use. It is no longer practical for me to keep using this software. It forced me to look around for the first time in many years. Others might have taken the groundswell of protests and queries on how to downgrade and multiple offers of money to just go please back to how it was, as a reason to stop and rethink. But no. People were met either with requests to justify themselves, told by the developer that they must be persuaded before they will act, met with complaints about the issues having been raised already, or just plain ignored. Check the forums, it's scary. A bunch of people have escaped to FairEmail, and I did this today myself. FairEmail has an option to open to a summary view by default that shows all accounts with an account summary including unread count, a feature removed from K-9. There are probably other good options too. Good luck everyone.

  2. Erik Johansson-avatar

    Erik Johansson

    Open source mail client, big plus for being open source. More secure that way than all those other "free" mail clients. K-9 works great and looks better with new ui, more in tune with how android is looking. I like it. Now I can even get my friends and family to use it, before it looked complicated so they didnt even try and instead looked for something easier.

  3. Chung Yeh-avatar

    Chung Yeh

    Well tried to be patient, but I'm done using this formerly awesome program. Off to using FairEmail as they have a easy to use unified account, page. Easier cycling through emails, etc. Subtle things that aren't great but I can get used to it. Note to developers: user base for k9 aren't here for pretty icons.. We are more saavy and demand usability and functionality. Goodbye

  4. Ben Hollingsworth-avatar

    Ben Hollingsworth

    K-9 has been my favorite mail app for years... right up until the July 2021 update. The new UI is truly awful. Many of the most common tasks are now far more difficult, and they've completely removed some functionality. (1) I can no longer specify custom notifications per account. I have to use either the loud, system-wide notification or no notification at all. (2) I can't poll for email more frequently than 15 minutes. (3) The delete (etc) buttons moved to the top of the screen, away from my thumb, requiring two hands to operate. (4) The app no longer opens to a summary page showing all the unread emails for all of my accounts. (5) Switching from one inbox to another inbox is more difficult and unintuitive. (6) It still doesn't support OAuth2 for my 2FA account. I'm going to try to reinstall the older version or find a different app.

  5. Claire Ruben-avatar

    Claire Ruben

    I used to love this app, but the latest update has removed the features that I loved it for. I can no longer poll a server on demand, I can no longer open the app to the overview page showing me all my accounts with the number of new mails in each, and I can no longer select several messages from the inbox view of an account and delete them in one go. If I can't revert to the previous version I shall have to find something else. Oh sure, the new interface looks fine, but the functionality seems to have disappeared. If it's still there it's hidden somewhere.

  6. canofbutter-avatar


    The new UI is really terrible. The summary list view of all accounts was extremely nice and now requires several extra steps to make anything similar show up. The buttons at the bottom being missing now also requires too many extra steps to complete the same tasks as before. Other than having a "new look," there is nothing added by this redesign.

  7. Chris Peterson-avatar

    Chris Peterson

    Used this happily for years. But the recent change adds nothing useful, and takes away great features (can't set the notification light color, can't set the vibration pattern). And on my wife's phone, as well as a friend's, it simply doesn't send outgoing mail. No warnings, no apparent errors, messages in the Sent folder. But nobody receives them. I might roll my version back, despite being cumbersome. Or I might look around for other options. In its current form, I don't recommend this app.

  8. John Oakhill-avatar

    John Oakhill

    Well, that went downhill. The new interface is a shiny bauble, but less functional. When I open the app I don't want to go to the last inbox I was looking at. That makes no sense. The old default screen showing all 12 of my mailboxes, with new message count and flagged (starred) message count was more informative and I could view whichever mailboxes I wanted, in the order I wanted. It's always a backward step to require more keystrokes to achieve a result, and the new interface does exactly that. At least include an option in settings to choose the default opening screen, and PLEASE bring back the star count. That's how I know where the important messages are.

  9. Jonathan Foster-avatar

    Jonathan Foster

    Latest upgrade is a step backwards. Hard returns in drafts which have to be manually removed, and default display of incoming mail is too small to read. Shame. This used to be a really good app. I may stay with it for now, but only because of the unified inbox feature. Tried to write to the developers about this before posting but only got a snarky automated response concluding with "Really, there's no point in trying!" Really? A good way to drive users away.

  10. Oscar Machado-avatar

    Oscar Machado

    K9, listen to your users/clients... Bring back the old interface, bring back the accounts list!!! As it stands, K9 just descended into the average email client app. I'm uninstalling this version and reinstalling the previous version (and preventing it updating). I speak for a vast number of users when I say i want the next redesign to bring back the accounts list as opening screen 👍 Otherwise, keep up the good work! And remember, if it ain't broke, don't fix it.