(92,299 ratings)
  • Show image previews for attachments with application/octet-stream MIME type
  • Improved display of certain HTML messages
  • When auto-completing email addresses show starred contacts first
  • Improved preview text extraction
  • Improved support for encrypted subjects
  • Extended certificate dialog to show SHA-256 and SHA-512 fingerprints
  • Use correct OpenPGP key when sending signed-only email after switching identities
  • Fixed bug where using certain search text would crash the app
  • Fixed bug where state was lost on screen rotation in unread widget configuration
  • Many internal changes
  • Updated translations

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
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 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:

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This release may come in several variants. Consult our handy FAQ to see which download is right for you.

5.719 APK
October 4, 2020
Android 5.0+
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May 1, 2021
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