K-9 Mail

Mozilla Thunderbird

In-app purchases

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.

Ratings and reviews

it's a no frills email client. it's nice to see something light weight but why the hell would you not have the option to log out if you're not going to put a password or pin limiting the app. all someone has to do to get access to your entire life is pick up your phone 🤷🏻‍♂️ *after messing around you can log out by "removing account" but somehow Google remembers you and doesn't ask for a password to reconnect the account. that seems crazy to me on Google's end as well but that's this timeline

I loved K-9 before this update. But now it's so hard to distinguish between my accounts in the menu. Before, I'd given each one a different profile pic and color, so I always knew which account I was looking at. They also appeared in a set order, so I could navigate easily. Now 4 of my 5 accounts are labeled "GM," and the highlight color is the same for all 5. What?! AND each time I open an account, the list order shifts, so they're never in a predictable order! Wish there were a way to revert.

UPDATE 7/28/21 What did you do!? So many options gone and seriously, no option to view ALL accounts at once?? This was by far the best client I had ever found and I've been a user for years. I agree with so many people here, it's just become just a other regular single account app with this update. :-( OLD: 5 stars - By far the best and most complete mail app I have come across. The ease of use and the ability to customize every little detail makes an unbeatable combo.

What’s new

- 'Auto-fit messages' setting did not persist
- Edge-to-edge move/copy regressed with 3-button nav
- Swiping message left/right could abort prematurely
- Outlook SMTP failed authentication for some accounts
- Gmail folder prefixes appeared after refreshing folder list
- Quiet time preferences were ignored
- Thunderbird could crash after deleting an account