K-9 Mail

by K-9 Dog Walkers
3.0 out of 5 stars850 customer ratings
Guidance Suggested
Price: Free Download
Sold by:Amazon.com Services, Inc
Languages Supported: Arabic, Chinese, Czech, Dutch, English, French, German, Greek, Hebrew, Italian, Japanese, Korean, Polish, Portuguese, Russian, Spanish, Vietnamese

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Latest updates

What's new in version 5.208
  • Various bug fixes

Product Details

Release Date: 2011
Date first listed on Amazon: March 15, 2011
Developed By: K-9 Dog Walkers
ASIN: B004JK61K0
Customer reviews:
3.0 out of 5 stars850 customer ratings

Product features

  • E-mail client with highly customizable search, filing and account set up options
  • Clean layout features elegant e-mail summary and reply options triggered by a long-press
  • Program supports IMAP, POP3 and Exchange (with WebDAV)

Product description

K-9 Mail is an open-source e-mail client with search, push email, multi-folder sync, flagging, filing, signatures, bcc-self, mail on SD & more!

K-9 supports IMAP, POP3 and Exchange (with WebDAV).

K-9 is a community developed project. If you're interested in helping to make the best mail client on Android even better, please join us! You can find our bugtracker, 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.

You can find K-9's release notes at: http://bit.ly/new_k9

User Data Privacy

Information not provided by the developer.

Technical details

Size: 4.5MB
Version: 5.208
Developed By: K-9 Dog Walkers
Application Permissions: ( Help me understand what permissions mean )
  • Access information about networks
  • Open network sockets
  • Read the user's contacts data
  • Read from external storage
  • Read the sync settings
  • Get notified that the operating system has finished booting
  • Access the vibration feature
  • PowerManager WakeLocks to keep processor from sleeping or screen from dimming
  • Write (but not read) the user's contacts data
  • Write to external storage
Minimum Operating System: Android 4.0.3
Approximate Download Time: Less than 1 minute

Customer reviews

3 out of 5 stars
850 global ratings

Customers say

Customers like the email app of the mobile application. They mention it's much better than the e-mail program that comes with it, adequate for simple email needs, and worth the price. Customers are also satisfied with the easy management of email accounts. However, some customers dislike the sync speed and have mixed opinions on the functionality, ease of use, appearance, and speed.

AI-generated from the text of customer reviews

Select to learn more
Great email appWorth the priceEasy to manage email accountsFunctionalityEase of useAppearanceSpeedSync speed
104 customers mention "Great email app"80 positive24 negative

Customers like the great email app. They mention it's much better than the e-mail program that comes with it, adequate for simple email needs, and works well. Some say it'll do a pretty good job getting their email on the Kindle Fire and is able to respond to emails.

"...It's a simple yet powerful mail app that's pleasing to use and runs very quickly, unlike the stock email app...." Read more

"...This is by far the best email app that I have found for the Kindle Fire...." Read more

"...Does not sync well with Yahoo Mail. Gmail is fine, but Yahoo must be done manually and messages can get stuck in the outbox...." Read more

"...That being said, K-9 is not a fancy client and it does have some odd quirks, I guess because it was designed for phones, not tablets..." Read more

17 customers mention "Worth the price"17 positive0 negative

Customers find the mobile application worth the price. They mention it's free, has a reasonable price, and the capabilities are worth the trade-off for heavy email users. Customers also say it'll be worth their time to download and use to their heart's content. They appreciate the secure connections and the download only what is necessary.

"...$0 is also a pretty reasonable price, I'd say." Read more

"...and it's free so you have nothing to lose." Read more

"...It has a friendly user interface, uses secure connections, downloads only what is necessary to let me know if I want to see the entire message and..." Read more

"this app does what it should and is easy to understand. best of all it is free. thanks k-9 dog walkers...." Read more

16 customers mention "Easy to manage email accounts"13 positive3 negative

Customers find the mobile application easy to manage. They mention it picks up all their e-mail accounts, combines them in one place, and allows for easily selecting all messages at once. They also say it's easy enough to set up their email accounts and compose an email.

"...from liking it and being accustomed to it, I was also able to quickly import all my accounts onto the Kindle...." Read more

"...It does pick up all my e-mail accounts which is a big plus." Read more

"...the stock Fire Phone email app, mainly because it allows for easily selecting all messages at once...." Read more

"Was easy enough to set up my email accounts and compose an email, but once I finished writing the email there's no SEND button!..." Read more

142 customers mention "Functionality"91 positive51 negative

Customers have mixed opinions about the functionality of the mobile application. Some mention it works well, while others say it doesn't work for them. They also say it lacks enough functionality outside of just email for business.

"...K-9 Mail installed very easily, was a breeze to setup and works like a charm...." Read more

"...All the functions seemed to work fine on the Kindle, including accessing the address book..." Read more

"...I opened a new issue and listed all the things that were no longer working correctly (verified by someone else having the same problems) so I..." Read more

"Some times it works great, and for no reason I can find, sometimes it doesn't...." Read more

98 customers mention "Ease of use"61 positive37 negative

Customers have mixed opinions about the ease of use of the mobile application. Some mention it seems user-friendly and easy to setup. However, others say it's not intuitive, the options menu must be accessed from opaque icons, and it was confusing at first to set up. They also say the interface is a bit too busy and the screen format cannot be changed.

"...K-9 Mail installed very easily, was a breeze to setup and works like a charm...." Read more

"...It isn't intuitive as the options menu must be accessed from opaque icons, and it limits messages to an arbitrary short length...." Read more

"...Ever since, I've fallen in love with how customizable and easy to use K-9 is once you get the settings how you want...." Read more

"...It was easy to set up my Gmail account--just a few quick screens where I entered my username and password...." Read more

19 customers mention "Appearance"9 positive10 negative

Customers have mixed opinions about the appearance of the mobile application. Some mention it looks great, has a good and attractive interface, and is easy to use. Others say it's not pretty, not fancy, and not as nice as the original. They also mention the layout of the page is not as good as they would like.

"...Basically, it's the dog and it doesn't match the look/feel of any of my other messaging widgets...." Read more

"...And it looks great!My Q is, why does the preprogrammed signature say "Please excuse my brevity"?..." Read more

"...There is no mechanism to block unwanted mail.Too colorful and is jamming my data.plan on my phone...." Read more

"This product is only so-so. It's plain and straightforward which is usually a good thing, but does not give a good preview of emails...." Read more

18 customers mention "Speed"12 positive6 negative

Customers have mixed opinions about the speed of the mobile application. Some mention it's super fast, responsive, and the updating process is much quicker. However, others say it'll keep freezing during setup.

"...Giving people the option is a good thing.* It is quicker than the default client, at least with my IMAP account...." Read more

"...I then asked why it was slowing down and not deleting messages and got no reply...." Read more

"...It pushes emails in real time to the notifications bar, as per your settings, and polls the server at your chosen intervals..." Read more

"Pros: User interface is very nice and customizable. Its fast and hasn't crashed on me...." Read more

18 customers mention "Sync speed"5 positive13 negative

Customers are dissatisfied with the sync speed of the mobile application. They mention it doesn't sync well with Yahoo Mail and doesn't connect to their Exchange server.

"...Does not sync well with Yahoo Mail. Gmail is fine, but Yahoo must be done manually and messages can get stuck in the outbox...." Read more

"...MailDroid wouldn't connect either. K-9 Mail connected on the first try - both receiving and sending...." Read more

"...It syncs quickly and I haven't had any problems with it so far." Read more

"...Unfortunately, it will not connect to our exchange server, even though I have carefully checked the settings...." Read more

Top reviews from the United States

Richard G. Mills
1.0 out of 5 stars K-9 Mail no longer works on Amazon Fire! Don't waste your time downloading, installing, and configuring it.
Reviewed in the United States on December 17, 2016
Verified Purchase
K-9 Mail
I loved this when I first got it. Then I started having problems with it skipping e-mails. I posted the problem and received little help; then I came up with a possible reason, and was told it made sense. I then asked why it was slowing down and not deleting messages and got no reply. So, today, I opened a new issue and listed all the things that were no longer working correctly (verified by someone else having the same problems) so I could find out what to do about it. I received a highly rude reply calling my description an unhelpful rant and implying they couldn't do anything anyhow because they could no longer upload K9 upgrades to the Amazon store. (The current Amazon one is outdated.)

Here is what I posted:
Expected behavior

Deleted items should delete and stay deleted; items saved to Drafts should show up in Drafts; e-mails should open immediately, delete immediately, and return to Inbox immediately.

When I first got my Fire tablet, I recommended K9 to my cousin who has a Fire tablet, and she loved it. Today, I mentioned losing the K9 draft, and she said she started having trouble with K9 "a long time ago" and stopped using it. So it isn't just me nor my limited storage Fire.

Actual behavior

I have to delete items dozens of times to get them to stay deleted; they reappear as read in both the Inbox and the Trash folders. When I save an e-mail in progress to Drafts, it just disappears, and I have to start over. It has started taking longer and longer for K9 to respond to anything I try to do with it, often going to black screen, returning to the Folders menu because it got stuck doing whatever I tried to get it to do, showing only the top half of the accounts screen or Inbox screen, or message screen.

Steps to reproduce
1.Do anything on the Fire tablet.

And this was the response:

Without logs or any debug information this is just an unhelpful rant. I'm not sure if @cketti has the ability to push to the Amazon app store. If not then there's little we can do.
2 people found this helpful
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Justin Sayne
5.0 out of 5 stars Works Great!
Reviewed in the United States on March 30, 2014
Verified Purchase
I wanted a different email client than the one that my Kindle HD 8.9 came with because I could not find anywhere a mechanism, process or procedure for bulk deleting inbox items nor trash except for deleting the mail account and then adding it back in. My ISP does not offer an option to delete messages from the server when I download my mail. I have to wait at least 24 hours. When I get on my laptop in the morning and bring in 250-300 emails, I read what I need to read and bulk delete the rest. When I get on my Kindle later in the day those same emails and more come wafting in and I have to manually delete them from both the inbox and the trash. I found it utterly bewildering in an era, where email is a way of life, one would have to delete items one at a time first from the inbox and then from the trash. K-9 Mail installed very easily, was a breeze to setup and works like a charm. I can select all and delete in both the inbox and the trash folder - Easy Peazy. $0 is also a pretty reasonable price, I'd say.
5 people found this helpful
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strategy game fan
3.0 out of 5 stars solves one persistent Android problem; brings another to the table
Reviewed in the United States on November 16, 2011
Verified Purchase
The default mail client on my MyTouch4G dings. A lot. It makes me friggin' batty with all of the dinging that it does. Once it gets a message, it persists in telling me about it until I do something. It will do this all night long if I don't remember to put the phone on silent. In addition, the default client periodically deletes all 7 of my e-mail accounts. These things made me a very unhappy camper and set me to looking for a replacement.

Everything I read said that K-9 mail was the perfect solution to my problem, so I tried it, at the very low price of FREE. After the great reviews, I was willing to pay for the thing, so the free price was a bonus. I installed K-9 and set up my 7 accounts and hoped that I was on the road to e-mail nirvana. Unfortunately, nirvana remains a good distance away.

Things that work:

* I was able to hide the combined mailbox. I like segregating my email accounts, so see no need for a combined folder to clutter my view. Some people may want one. Giving people the option is a good thing.
* It is quicker than the default client, at least with my IMAP account. Maybe I finally got the account set up correctly, but it works a lot better in K-9 than an in any other client.

Things that don't work, at least for me:

* K-9 can't deal with attachments to messages sent from Outlook unless the message was sent in plain text format. I am not able to ask my clients and opposing counsel to re-send things in plain text just so that I can read their attachments. This one failure completely ruins K-9 for me. However, the developers MAY be addressing this in their next major revision.
* Dogs can't count. K-9 does a good job of notifying me of new mail, but always has the wrong number of messages in the notification message. This is a minor niggle, but it is something that they should look at.
* No widgets. I got really used to the default mail client having a widget for each of my two main accounts with a little number on top of each one telling me how many messages are unread in each one. K-9 lets you put an icon for each account on your phone, but it doesn't do anything but take you directly to that account.
* It just doesn't feel right. The default mail client felt natural to use. K-9 feels like a kludge.

When I discovered that K-9 did not support attachments, I went back to the default mail client for a while, but then realized that I only needed that for attachments, so am using K-9 primarily, with the default client set up to access, but not automatically poll, accounts so that I can get messages with attachments and download them as needed. Like I said, using K-9 is a kludge. This whole e-mail problem just makes Android look bad.

UPDATE: When I finished writing my review, Amazon displayed ads for some other products that I might like. One was Maildroid, which intrigued me. I read some reviews and decided to give it a try. It is a great product and I have now paid the $18 for the Pro version (unfortunately, I had to get it from Google, as Amazon does not sell it) and dumped K-9 entirely. Maildroid "feels" right. It took about 30 minutes of tweaking to get it set up exactly how I like it, but that's not bad with 7 email accounts. Bye bye, K-9.
7 people found this helpful
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Top reviews from other countries

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Marc Champagne
1.0 out of 5 stars Usine à gaz, passez votre chemin !
Reviewed in Canada on June 14, 2023
Verified Purchase
Une usine à gaz !
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伏鐘
5.0 out of 5 stars Doctor Who
Reviewed in Japan on June 8, 2022
Verified Purchase
Doctor Who を見ましょう。
K-9 Mailのアイコンの意味も分かりますし、
愛着も湧いてきます。
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ghostdancer_am.es
5.0 out of 5 stars El mejor programa de correo para Android
Reviewed in Spain on April 19, 2014
Verified Purchase
Es opensource y además combinado combinado con APG puedes firmar,cifrar y descifrar los correos con gpg o pgp. Imprescindible y recomendable.
One person found this helpful
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federmatt
5.0 out of 5 stars Il miglior cliente per la posta elettronica su Smartphone
Reviewed in Italy on April 8, 2014
Verified Purchase
Dire che va bene è restrittivo. Dire tutte le sue qualità è difficile. Comunque,dopo le prove di molte altre apps mi sono fermato su questa. E' configurabile al massimo, svelta nel dare le mail di più gestori di posta elettronica. Ben fatta davvero.Complimenti agli sviluppatori.
One person found this helpful
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Lutz Büttner
5.0 out of 5 stars Einfach und gut
Reviewed in Germany on February 28, 2014
Verified Purchase
Ein zu bedienende App. Umfangreiche Einstellungsmöglichkeiten. Hab diese App. gewählt weil sie auch das SSL-Protkoll unterstützt. Als kostenloser Mailclient sehr zu empfehlen.
One person found this helpful
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