K-9 Mail

Mozilla Thunderbird

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 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.

Ratings and reviews

It crashed many times during setup. Can't get passed setup. Edited: After numerous attempts I identified the step at which the setup was crashing. After typing the password to log into my email account, making the PW visible would crash the app. Finally, I set it up. Nice app, simple, not many bells and whistles, works well with Google, Microsoft.

K-9 mail is a very good email app. It's easy to set up, and has all the options the average user needs. Could it use a few changes? Yes, instead of using the bottom of the screen for downloading the entire message, I believe the delete button at the bottom would be more useful and easier to use than having it offset at the top of the screen. I've used canine mail many years ago and lost track of it. I'm glad that I have found it again. Great job developers!

I switched from Edison Mail to K9 because Edison wasn't working right. This app is ok...sort of. Idk why, but I keep getting the message "authentication failed", whenever I leave my home. It won't sync while using 5G, I have to go in and press connect so the mailboxes for them to re-authenticate. There's nothing wrong w my wifi at home and my phone doesn't have this problem w any other app. So I'm not sure what the problem is. I may have to find another email app where I can get all my emails.

What's new

- Added a workaround for a crash when the system is restarting the Push foreground service
- Updated the app to target the Android 14 API
- Updated translations