K-9 Mail

Name: K-9 Mail
Availability: InStock
Rating: 3.3142857551574707 (99770 reviews)
Author: Mozilla Thunderbird

Mozilla Thunderbird

In-app purchases

3,3

99,8K reviews

5M+

Downloads

PEGI 3

About this app

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.

Updated on

10 Mar 2025

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region and age. The developer provided this information and may update it over time.

No data shared with third parties

Learn more about how developers declare sharing

No data collected

Learn more about how developers declare collection

Data is encrypted in transit

Data can’t be deleted

Ratings and reviews

3,4

94,6K reviews

Leigh Cook

07 November 2024

I really don't like the latest update. I used to be able to see my list of named email accounts, but now that's been replaced by circles with 2 letters each, and most pairs are all the same, so I can't see which account eacg belongs to. Every time I open one up, the order of the circles changes. That's frustrating and time-consuming. It'd be helpful if you could drag the list to the right to see the account names. Sorry guys, I need to find a replacement now after loving this app for many years.

28 people found this review helpful

Mike Smith

08 November 2024

Honestly this new update stinks, like most others are saying the account interface is worse now. But not only that when I reply to emails it keeps hanging on a black screen then crashing, this was never a thing on the previous version so why so this to what was a great email app. Update, literally can't reply to an email, I've restarted the app, cleared the cache, rebooted the phone. I don't want to clear the data as I'll have to set it up again as I doubt an export will solve it. Help!!!!!!!!

38 people found this review helpful

A Google user

12 January 2025

I'm a long time user of K9. Latest update (April23) seems to have increased the message subject area significantly... Now taking up nearly half of my screen with white space. I can't find any way of reducing this. Otherwise a great app. Just please stop meddling with the UI. V5 was the best! So, in Jan 25, I've settled down to the changes and my one star review seems a bit harsh. I'm actually very happy with the way that K5 works with multiple accounts and that it is ad and clutter free.

13 people found this review helpful

What's new

- Basic support for Android 15
- Add a link to the support article when signing in with Google
- Account setup attempts email provider's autoconfig first, then falls back to ISPDB
- Updated translations for multiple languages
- The changelog now properly displays release versions
- A wrong translation of the app name has been fixed
- Dependencies have been updated to fix a couple of bugs

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