AI summary
Open source email client supporting multiple accounts with unified inbox, background sync, and OpenPGP encryption via OpenKeychain. Version 20.0 adds Thundermail configuration and fixes account drawer, avatar display, print formatting, and tablet compose issues. Camera and contacts permissions are optional for attaching photos and addressing messages.
Generated by AI. May contain inaccuracies.
Screenshots
About this app
K-9 Mail is an open source email client that can be used with basically all mail service providers.
characteristics
* Support multiple accounts * unified inbox * Privacy friendly (no tracking, only connected to your email service provider) * Automatic background synchronization or push notifications * Local and server-side search * OpenPGP Email Encryption (PGP/MIME)
Install the application OpenKeychain: Easy PGP and use OpenPGP to encrypt/decrypt email.
support
If you are experiencing problems using K-9 Mail, please seek help on our support forum.
Want to help?
K-9 Mail is a community development project. If you are interested in helping improve apps, please join us! You can find our error tracker, source code and wiki here at https://github.com/thunderbird/thunderbird-android. We always welcome new developers, designers, documentarians, translators, testers and friends to join us.
What's new
- K-9 Mail version 20.0
- New: - Enable easily discoverable way to configure and use Thundermail
- Changed: - Only show message notification config actions above the cutoff
- Fixed: - Account drawer stayed open after account switch despite auto-select Inbox setting - Imported settings could incorrectly show 'XX' avatar monogram - Printed emails omitted message headers and used minimal margins - Compose button did not work in tablet split-screen message view
About this version
- Version
- 20.0 (39039)
- Size
- 10.11 MB
- Requires Android
- 6.0
- Target SDK
- 23
- Architecture
- arm64-v8a, armeabi-v7a, x86, x86_64
- Downloads
- 37
- Updated
- Jun 25, 2026
- Package
- com.fsck.k9
Ratings & reviews
- 51
- 40
- 30
- 20
- 10
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