K-9 Mail APK

Version 5.600 - com.fsck.k9
Last updated: 2019-08-12 03:07:15

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

K-9 Mail apk

APP Information

App Download Version5.600 (26000)
Updated2019-08-12 03:07:15
Apk Size4.58 MB
App DeveloperK-9 Dog Walkers
Malware CheckTRUSTED
Install on Android4.0.x and up
App Packagecom.fsck.k9.apk

Download K-9 Mail 5.600 APK

App Description

K-9 Mail is fsck,communication,mail, content rating is Everyone (PEGI-3). This app is rated 4.31 by 36 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 4.0.x and higher Android devices. The Latest Version of 5.600 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 K-9 Mail APK Mirror. This app APK has been downloaded 175947+ 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 Screenshot 1K-9 Mail Screenshot 2K-9 Mail Screenshot 3K-9 Mail Screenshot 4K-9 Mail Screenshot 5K-9 Mail Screenshot 6

Reviews From google play store

Great email app. Normal traditional interface. A little on the slow side but stable and competent. Best I've found. Added: On new tablet with Android 7.0, syncing self disables. I can toggle it back to on using the global network setting for background sync, but it wil be disabled again in an hour more or less.

Good email client, but there is few very uncomfortable moments. 1) When I try to star message in list(star button placed most right side), then it's like roulette - will it star message or will it activate hidden scrollbar and fling somewhere me in a list. 2) Message grouping is not good enough. Many messages that correctly grouped by gmail will not be grouped by k9

After fighting my way through the settings and having it behave like I wanted it to (being immediately notified when an email arrives, actually ...) the app started changing it's behavior out of the blue after working well for a few months. All of a sudden, I get incoming email notifications only after activating the screen (taking the phone out of sleep). Btw, I always keep the app running in the background. Sorry but I don't like inconsistent apps. So I am looking for an alternative.

I installed K-9 Mail because I needed the encryption capability which works great. The only negative comment I have is that it doesn't seem to save the email your working on when your phone shuts down due to low battery. The email I was working on was enabled for encrypted setting, don't know if that had anything to do with it ?

How the Mighty Have Fallen - used to be my go-to app for email on all my Android devices, but since I upgraded to an S8+, the app no longer syncs my mail. Checked the dev forums, this issue was reported but the devs closed the ticket as "will not fix," so the app is essentially useless to me now. Good job shooting yourselves in the foot.

Its one of the best email apps I've ever had. Downgraded to 3 stars because there is no print feature. Should let me print to my network printer. Most of my other apps such as pdf viewer let me print, I think it is a feature that could be a possible upgrade for this app.

I've been using K-9 Mail since my first Android devices (HTC EVO 4G and Acer Iconia 500 tablet), and it's only gotten better over the years. I'm currrently using it on my Moto G5S Plus phone and Samsung Galaxy Note 10.1 2014 Edition tablet. I recently tried it on my ChromeBook, but was very disappointed in how it was formatted/displayed on the larger screen. I then discoverd that I can just run the full version of Thunderbird via Crostini on my ChromeBook, but this is still my favorite Android email app. It's reliable, stable, easy to navigate, and just plain works.

Syncing mail was totaly unreliable until I was informed about Android Battery Optimization special permission setting. Now it works! Would love to see an option to create IMAP folders. Would love to see a search (with highlighting) within a message. Would love to have an option to browse messages marked for deletion. Most important to me is switching between identities.

This eMail app is open source and still under construction. Open Source is the way to go with any app like this for security reasons. It works great. It's a little different then most but there is plenty of documentation on GetHub. Super fast and highly configurable. I would not suggest this email app for a novice although basic configuration is documented and most of it is preconfigured. Just add your Gmail account and you should be ok. I however suggest you go to GetHub and read through the folder class information. Works super fast. Way faster and smaller then Gmail or your native email client. Once you get it working you can bloat stop Gmail and native. No stinking ads which you know that's not the case for others. Small in size over other email clients. Reliable and so configurable. Great job open source team. Still has some small growing pains but they are still working on it. Again I do not suggest it for a novice but it can be done. Ron @ Memphis, Tennessee USA

On Android 8 there's every other time "Syncing Disabled" (though manual sync works) makes app unreliable and by that almost unusable. @dev: It's not your bloody job to decide when to sync. Just _try_ it *each*and*every*time* you're supposed to sync.

My phone manager keeps popping high power consumption from this app. Can this be improved? And all of a sudden I can find mails in individual accounts. They all grouped into Unified I box and All Messages. Please enlight me. Thanks!

I have used this for several years and currently have it installed on my phone and Kindle with 9 email accounts all feeding into the unified inbox. Even though many reviews mention trouble with syncing, once you have all the settings cooperating with each other everything works just fine. My only complaint is that encrypted password is not supported.

The "sync diasbled"-bug is still going strong with this one ... Edit: the "syncing diasabled"-stuff was just the standard text showing at the top of the gui, I learned to life with it. But after the last update I can't access one of my accounts in the app anymore. Renders it useless

Having finally upgraded to the latest version, I still have occassional issues around notifications. I have decided to live with the abomination that is the new icon (the primary developer has misunderstood what the material intrface rules are.) All in all, this is still one of the better email apps, but is no longer the best in class (it works, but that's about it!)

For the most part I like this email client and use it extensively from my phone emailing however it absolutely sucks when I send a few attachments. It Gets Stuck on Stupid sending even when I delete the damn email. It takes forever

An excellent UI and feature set. Best android MUA yet tested. I can't use this because it uses too much memory for this moto g6 with large maildirs. If lazy data loading, more agressive GC, or other memory optimization is implemented I'll try again. I mainly came to give autocrypt a try and this inspires me to finally get muacrypt into my normal mutt workflow in termux. Thanks for the nice program :)

For some reasons, on my Pixel 2XL Android Pie, K9 is always on the second or third battery drain. It feels like it's always draining battery. FYI I have not optimized the app so that I can receive email push. Same thing for Gmail app but no such battery drain for Gmail app or other non-optimized apps I have.

Got me beat! Spent hours trying to get this to work with an imap account. I could get each folder to download messages once, but the moment I would do a refresh, all messages disappear and no joy ever getting them to redisplay again. I suspect the sync mechanism is badly broken based on my Google research. Running on a Samsung Galaxy S8 FWIW

Been great until three days ago and it just stopped working. Rebooted phone. Reinstalled. Nothing. It goes to load messages from hotmail and the progress wheel just spins and spins...nothing. UPDATE - never got a response from the developer. But tried it again later. Quirky. Some messages just do not come through at all. it has actually been some very crucial ones as well. The current problem I have, is now, after I read a message, it disappears, deleted from stored messages. Very Very bad.

One star off for the idiotic, ugly new logo icon. Old review : This app is not perfect, but how come a basically volunteer effort produces a much better email app than multibillion dollar corporations can? Gmail, etc, be ashamed...

Apk scan results

Apk Scaned By TotalVirus Antivirus,com.fsck.k9.apk Was Pure And Safe.
Scan Stats:failure:0|harmless:0|malicious:0|suspicious:0|timeout:3|type-unsupported:11|undetected:53|
Name:6vyh8ZCzFeix9S66FTsP20190724-78669-1cofnbj SHA-1:ce078400927c41666ead0e813f6cb989ac13ca94 SHA-256:f49bd276fc230f58caa41d600cd25d2a79dc3586614fea086a71a5735c8e8224 SSDEEP:49152:6RriInbniuFnwX3IfvTLEnuLwplt1ecV6SkpEpieAYAV4doipp+b7m+82HB/MW8o:DIbniasCHEuLwvtMcVgS9SIo File type:Android Magic:Zip archive data, at least v2.0 to extract File size:4798121 Uncompressed Size:6957154 Contained Files :664 Contained Files By Type:MF:1,RSA:1,SF:1,dex:1,gif:1,md:1,png:431,so:7,xml:199,


requires following permissions on your android device.

view network connections
Allows the app to view information about network connections such as which networks exist and are connected.

full network access
Allows the app to create network sockets and use custom network protocols. The browser and other applications provide means to send data to the internet, so this permission is not required to send data to the internet.

read your contacts
Allows the app to read data about your contacts stored on your phone, including the frequency with which you've called, emailed, or communicated in other ways with specific individuals. This permission allows apps to save your contact data, and malicious apps may share contact data without your knowledge.

read sync settings
Allows the app to read the sync settings for an account. For example, this can determine whether the People app is synced with an account.

run at startup
Allows the app to have itself started as soon as the system has finished booting. This can make it take longer to start the phone and allow the app to slow down the overall phone by always running.

control vibration
Allows the app to control the vibrator.

prevent phone from sleeping
Allows the app to prevent the phone from going to sleep.

modify your contacts
Allows the app to modify the data about your contacts stored on your phone, including the frequency with which you've called, emailed, or communicated in other ways with specific contacts. This permission allows apps to delete contact data.

modify or delete the contents of your SD card
Allows the app to write to the SD card.


Certificate Issuer:C:US, CN:Jesse Vincent, L:Somerville, O:fsck.com, ST:MA, OU:Open Source Labs
Certificate Subject:C:US, CN:Jesse Vincent, L:Somerville, O:fsck.com, ST:MA, OU:Open Source Labs









Interesting Strings


Older Versions

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