K-9 Mail

- September 5, 2017

Everyone

Communication

( 86,598)

Description

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.)

Reviews

4.2

86,598 total

5 51,278

4 19,474

3 6,785

2 3,593

1 5,468

bruce elliott

K9 Ver 5.208 Samsung S7. Been using K9 for several years on older S4 device, loved it. With newer android K9 will not reliably get email. Mostly I have to manually request it. I have tried several of the claimed tips to fix it. I had hoped the claim of the problem being fixed for this version was true. Nope, after a couple of days use, not fixed. I'm tired of fighting it. I really wish it was fixed but I'm wasting my time with it.

I have to admit, I was hesitant to take K-9 Mail for a spin because it's not much to look at and it didn't appear to offer anything particularly special... But whilst others may look pretty, I don't trust some of them as far as I can spit, so I decided to try-out K-9 Mail - and I'm glad I did! The everyday user will find that this is a fantastic e-mail client, while power users will be in heaven with the enormous amount of options and settings readily available. My only real complaint - and it's a big one - is that at the time of writing, K-9 Mail does not support digital certificates (S/MIME) for signing e-mail messages... Add support for that, and my (Google Play Store) review will be much higher.

A Google User

Used K9 for many years but now notifications totally not working on Android 6.0.1 Galaxy A5. In spite of settings configured to notify of incoming emails. Have to dump this and use Gmail app, which notifications work ok. Latest v5.208 still not working properly. There's still no email notifications when any email comes in. The only way to know if there's any new emails is to manually open the app.

Tim Meek

Have used, loved and recommended K-9 for ages, but it has stopped notifying me of emails. Sometimes it does, sometimes it doesn't and I have to refresh manually. I gave no idea why. This random intermittent bug makes it no good for me any more. I've missed too many important emails...

Danny Tan

Been using K9 for nearly 4 years now very user friendly and has performed all what such App should have. However, right now it allow mail movement to another folders within the same email ID but it would be better if it allow mails to be able to move from different email ID. K9 team please consider as many folks out there believe is using more then I email ID

A Google User

*EDIT!! Moderately new bug!!!!!* Usually LOVE this app - ALL I use, for MANY years ... but major problem with last update!! Outgoing emails will NOT send unless I'm on wifi (3G and 4G working fine, but emails won't sent, get stuck in outbox until wifi goes on (getting notification saying problem sending this email). Usually goes out perfectly fine once on wifi. This is a NEW problem!! ****I'm hoping the makers will see this review and fix this*** PLEASE!!??

User reviews

bruce elliott September 8, 2017

September 6, 2017

A Google User September 6, 2017

Tim Meek September 18, 2017

Danny Tan September 6, 2017

A Google User September 10, 2017

Mike Thompson September 10, 2017

Used to have problems with synching the device after 'idle' mode, but I could always force it through manually. After last update, synching works on Gmail but my Hotmail account won't even manually synch anymore. I'm over it. Time to find another email app.

William Ward September 5, 2017

First rate much better than the packaged android email client. Does exactly what it says it does. Highly recommended Started using k9 way way back and it's still by far the best email client for android....and now using it on my Chromebook which is now using android apps 😀

September 17, 2017

It's generally good, very customizable, absolutely secure against email privacy and probably the best (ad) free email app out there but since years unreliable as hell regarding the sync status after doze. You either never doze your phone or you have to open the app manually to reactivate sync. The latest bugfix didn't fix it for my Samsung Note 4.

Mark Meyer September 18, 2017

Have used K9 for years but with Android version 7+ on my Note 8 it does not always automatically push emails to me. Seems to be a problem with syncing that others have mentioned as well.

September 11, 2017

Like the program and look of the layout. Working on Android Nougat, Moto G5 Plus. Even though I have all 3 email addresses set to always fetch email, it never does. Always have to go in and sync manually. Needs to be fixed, please.

D R September 8, 2017

Great that i finally decide to drop Google even it try to block K9 signin as insecure Apps! It free me from Google strangling ransom. Whenever i disabled some bad GPlayService battery draining components, Gmail stop working. When GPlaystore erroneously not working, req reset Google acc, clear cache, which wipe all gmails & contacts. Sync again mess up contacts & waste data, as Google also sync everything, backup data, fit, people, picasa, calendar,...bye bye GApps.

James Watson September 15, 2017

Best mail app out there! Stupid icon, in my opinion, but I call deal with it.

jaem13 September 17, 2017

Not the simplest but a great, private email app which is not a scam. There are a few shady email apps on here but this is very legit. Yahoo and gmail accounts can be added but it's more difficult to do than just putting your email and password in. Yahoo must have less secure access enabled (and my goodness they will try to tell you frequently that isn't a good idea) and gmail needs an app password to be set.

September 12, 2017

Please add per account network background activity. I have 4 emails but I need every 20 min check for new email only on 1 account, but not on the others.

Michelle Justiniano September 15, 2017

Has gotten WORSE since the last update! Takes FOREVER to both open the app and when going from one email to another. It's VERY annoying! And still no print function! I found that very strange and would change my stars in a heartbeat if we can get a printing feature in this app!

A Google User September 6, 2017

Even after latest update, it isn't fetching mail until I tell it to. Background sync is set to Always.

dwi praptomo September 13, 2017

Current version has problem with syncing! No incoming mail notifications at all!

Simon Prosser September 15, 2017

Google blocks sign in because it is appearantly insecure.

Günther Wolff September 7, 2017

It still doesn't sync automatically I'm Android Nougat.

Rajesh S September 13, 2017

Will you look into the nougat version For this app, sync is disabled all the time as it needs manual push..

September 11, 2017

Worked well for over a year and with my new Samsung J7 sync continues to be disabled. Going to uninstall now.

Stephen Brook September 8, 2017

I can't find a way to print the body of an email on my SG4, only attachments . Since latest update sent mail is not synchronising with my PC.

James Traynor September 18, 2017

Crashes in Oreo on Pixel when composing messages after time

David Rosen September 6, 2017

Been using this for 5 years & has never let me down. I use it for three accounts, 1 pop, 1 imap and 1 Gmail. Elegant and simple.

Abnelmardy September 13, 2017

Sync problem on idle. Please fix.

Wafik Maher September 15, 2017

Very flexible in tuning but eats the battery. Samsung S8+, while all apps are battery consumption is 0.0x, this app is 1.8

Racing Video Gamer September 3, 2017

Awesome. Open source. What's not to love.

Sylvius Salvarian September 7, 2017

Well-supported email app - bugs fixed reasonably quickly. Easier to configure than the default Android Email.

David Kelly September 8, 2017

Sill says syncing disabled after a short time just like before.

Saiful Azis September 7, 2017

Best email app I've ever used. Very light and fast with the small size app. Thanks and keep updating this app

NIKESH September 16, 2017

Simply Superb Feature Rich App... 👍🏻

Andrea Richiardi September 6, 2017

Very simple yet powerful email reader. It integrates also with installed GPG providers for email encryption and signing.

io situ September 13, 2017

Error: forced closed

Bryant Walley September 15, 2017

Didnt connect to exchange. Needs work.

Črtomir Černeka September 19, 2017

Works as should great mail app

Fabrizio Bernardo September 6, 2017

Very nice.

Chris N September 12, 2017

Awesome and dope email app

Lexington Perez September 6, 2017

This is a very easy to use app. I have had no problems using it and haven't noticed any glitches or bugs. It's a great alternative to Google's email client that comes with Android, for those of you who are concerned about privacy online. I love the fact that it's open source but I don't know if the code has been thoroughly audited. Having said that I still highly recommend over a proprietary email client.

Kevin Leighton Crosthwaite August 18, 2017

It used to be the app would store several copy of a draft, copies of a message to the point it was annoying. Lately it will display my draft message and I can see a few lines in the preview. However, when I open the message the body is gone.