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About K-9 Mail

K-9 Mail is an open source email client with support for multiple accounts, search, IMAP push email, multi-folder sync, flagging, filing, signatures, BCC-self, PGP/MIME & more!

K-9 supports IMAP, POP3 and Exchange 2003/2007 (with WebDAV).

Install the app "OpenKeychain: Easy PGP" to encrypt/decrypt your emails using OpenPGP.

K-9 is a community developed project. If you're interested in helping to make the most popular open source email client on Android even better, please join us! You can find our bug tracker, 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.

If you're having trouble with K-9, please report a bug at https://github.com/k9mail/k-9 rather than just leaving a one-star review. We don't mind you telling the world that you're frustrated, but if you use our bug tracker, we have a better chance of fixing whatever's giving you a hard time.

You can find K-9's release notes at: http://bit.ly/new-k9

(People sometimes call K-9: K9, K9 Mail, K-9 Email, K9 Email, K9 E-Mail, k9mail or k9email.)

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Frequently Asked Questions(FAQ)

What is K-9 Mail?

K-9 Mail is an open source email client with support for multiple accounts, search, IMAP push email, multi-folder sync, flagging, filing, signatures, BCC-self, PGP/MIME & more!

What email protocols does K-9 support?

K-9 supports IMAP, POP3 and Exchange 2003/2007 (with WebDAV).

How can I encrypt/decrypt my emails using OpenPGP in K-9 Mail?

You can install the app "OpenKeychain: Easy PGP" to encrypt/decrypt your emails using OpenPGP.

Is K-9 a community developed project?

Yes, K-9 is a community developed project.

How can I contribute to the development of K-9 Mail?

If you're interested in helping to make K-9 Mail even better, please join us! You can find our bug tracker, 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.

What should I do if I'm having trouble with K-9 Mail?

Please report a bug at https://github.com/k9mail/k-9 rather than just leaving a one-star review. We have a better chance of fixing whatever's giving you a hard time if you use our bug tracker.

Where can I find K-9 Mail's release notes?

You can find K-9 Mail's release notes at: http://bit.ly/new-k9

Are there any alternative names for K-9 Mail?

Yes, people sometimes call K-9: K9, K9 Mail, K-9 Email, K9 Email, K9 E-Mail, k9mail or k9email.

I have used K9 for many years and continue to find it one of the best. Thank you.

Shamir James

Easy to set up unlike some of the others. Functional and easy to use. Brilliant job dev. 👍

Julie Haines

She's okey.

JamesPrada MindRiverPL

The 2020 updated version is only available in F-droid

Rahul S

Used this app quite a lot, recently kept telling me that this app may not work properly because it was made for older version of android, then direct me to google play only to find latest release already ins...

Rudolph Yustian

Do I love this app? AFFIRMATIVE!

Tim Berberich