K-9 Mail

Name: K-9 Mail
Availability: InStock
Rating: 3.3322980403900146 (99764 reviews)
Author: Mozilla Thunderbird

Mozilla Thunderbird

In-app purchases

3.3

99.8K reviews

50L+

Downloads

Everyone

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

3.3

94.5K reviews

Geobear Nine

8 April 2025

I finally got a newer phone that will no longer support good old version 5.60, which was a perfect 5 star email app, and I was forced to install 9.0. I REALLY miss having the app's primary screen be the list of accounts. I wish there were a setting that would allow me to bring that back. The current screen with the list of the current account's folders and list of accounts to the side would be ok. I loved that summary as my intro & exit view. Minus 2 stars for that glaring omission.

4 people found this review helpful

Susan Powell

13 March 2025

I've used and appreciated K-9 for many years. A request... In v 8.2 it pushes to the top of my in-box messages that it thinks I need to follow up on. Please provide a way to disable this function! It's confusing because the messages are not marked to differentiate then from new ones and irritating because I generally disagree with the algorithm on what needs my attention. Thanks for considering.

28 people found this review helpful

Dan Gilliam

5 November 2024

No. Just, no. It went from 5 stars to 1 in one version. The new interface is clunky and cumbersome, and unintuitive. The old interface was perfect, especially if you have multiple accounts. Please bring it back, make a legacy version, something. I am one inch away from going to another app and chalking this into the "Used to be amazing" list.

93 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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