- Home
- Email clients
- K-9 Mail
On the recordRead 12 Oct 202619 facts
K-9 Mail
Plans and prices
K-9 Mail
Free
Android email client · open source
Read 12 Oct 2026 · k9mail.app
On the record
- Accounts
- The app supports multiple accounts and works with basically every email provider.play.google.com · read 12 Oct 2026
- App coverage
- mobilek9mail.app · read 24 Sep 2026
- Audience
- The maker says K-9 Mail is designed for novice and power users.k9mail.app · read 12 Oct 2026
- Calendar tools
- Nok9mail.app · read 24 Sep 2026
- Documentation
- The user manual page says the manual has been abandoned because the team lacks resources to keep it up to date; a historic version remains available.docs.k9mail.app · read 12 Oct 2026
- Downloads
- The maker lists Google Play, F-Droid and direct APK downloads from GitHub as download channels.k9mail.app · read 12 Oct 2026
- Encryption
- K-9 Mail supports OpenPGP email encryption using PGP/MIME, and the listing says to install OpenKeychain to encrypt or decrypt email.play.google.com · read 12 Oct 2026
- Inbox
- Features include a unified inbox and per-account notifications.k9mail.app · read 12 Oct 2026
- License
- K-9 Mail is licensed under Apache License, Version 2.0, and its source code is available on GitHub.k9mail.app · read 12 Oct 2026
- Local data
- The privacy notice says names, email messages and address books are stored and processed locally on the device and never sent to Mozilla.k9mail.app · read 12 Oct 2026
- OAuth
- The privacy notice says OAuth authentication and synchronization happen directly between the app and the provider over an encrypted connection, without Mozilla-operated services.k9mail.app · read 12 Oct 2026
- Other features
- The maker lists white and dark themes, signatures, message flagging, multiple identities, keyboard shortcuts and attachment saving.k9mail.app · read 12 Oct 2026
- Privacy
- The Google Play listing says the app shares no data with third parties and collects no data; it also says data is encrypted in transit.play.google.com · read 12 Oct 2026
- Purpose
- K-9 Mail is an open source email client for Android with advanced features, designed to help users manage large volumes of email.k9mail.app · read 12 Oct 2026
- Search
- The app supports local and server-side email search.play.google.com · read 12 Oct 2026
- Support
- The maker directs users with questions to its support forum and also lists Matrix and GitHub issue tracking for community interaction.k9mail.app · read 12 Oct 2026
- Synchronization
- The app supports automatic background synchronization or push notifications.play.google.com · read 12 Oct 2026
- Unified inbox
- Yesk9mail.app · read 24 Sep 2026
