K-9 Mail for Android

K-9 Mail

thundernest

version 19.2

Full-featured email client

Downloads 1.2 M
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Rate & Review

Antivirus & safety scan results

Scan Date: Jun 4, 2026 Software Version: 19.2
Status: ✅ Trusted & Safe to install This app is signed by thundernest with trusted and verified digital signature and it will updated existing K-9 Mail installations Certificate fingerprint: 4bd9ea785dbbb1325c11f6889e90be0c7cc7b826 Issuer: CN=Android Team, OU=Mobile, O=MZLA Technologies Corporation, L=San Fransisco, ST=California, C=US How we verify APK files security
Android antivirus Status
K7GW Clean ✅
DrWeb Clean ✅
VirIT Clean ✅
ClamAV Clean ✅
Google Clean ✅
Ikarus Clean ✅
Lionic Clean ✅
Sophos Clean ✅
Yandex Clean ✅
Alibaba Clean ✅
Tencent Clean ✅
Xcitium Clean ✅
Fortinet Clean ✅
Kingsoft Clean ✅
Symantec Clean ✅
AhnLab-V3 Clean ✅
Kaspersky Clean ✅
Microsoft Clean ✅
Trustlook Clean ✅
ESET-NOD32 Clean ✅
Avast-Mobile Clean ✅
NANO-Antivirus Clean ✅
BitDefenderFalx Clean ✅

K-9 Mail Email app for Android description

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 youre having trouble with K-9 Mail, ask for help in our support forum.

Want to help?

K-9 Mail is a community developed project. If youre interested in helping to improve the app, please join us! You can find our bug tracker, source code, and wiki at https://github.com/thundernest/k-9. Were always happy to welcome new developers, designers, documenters, translators, bug triagers and friends.

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Specifications


Old Versions

K-9 Mail icon

19.0 APK

May 26, 2026

K-9 Mail icon

18.0 APK

April 30, 2026

K-9 Mail icon

17.0 APK

March 17, 2026