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What's new in Thunderbird Beta for Testers (f-droid version) 13.0
- Client certificate not displayed in SMTP settings
- "Enable debug logging" did not provide verbose logging
- Scrolling short email could trigger left/right swipe
- Landscape scrolling only worked in center of some screens
- IMAP folder operations broken with prefixes
- HTML/table rendering display broken
- Application crashed opening placeholder folder
About Thunderbird Beta for Testers (f-droid version) 13.0
Premium
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 you're 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 you're interested in helping to improve the app, please join us!
You can find our bug tracker, source code, and wiki at https://github.com/thunderbird/thunderbird-android.
We're always happy to welcome new developers, designers, documenters, translators, bug triagers and friends.
Download Thunderbird Beta for Testers (f-droid version) 13.0
This release may come in several variants. Consult our handy FAQ to see which download is right for you.
Version:13.0
Uploaded:October 21, 2025 at 8:56PM UTC
File size:12.34 MB
Downloads:136
Version:21.0
Uploaded:July 21, 2026 at 2:21PM UTC
File size:10.67 MB
Version:21.0
Uploaded:July 23, 2026 at 6:28PM UTC
File size:10.19 MB
Downloads:3
Version:20.1
Uploaded:July 9, 2026 at 10:32AM UTC
File size:10.11 MB
Downloads:9
Version:20.0
Uploaded:June 24, 2026 at 1:10PM UTC
File size:10.11 MB
Downloads:12
Version:19.2
Uploaded:June 6, 2026 at 9:31AM UTC
File size:10.09 MB
Downloads:19
Version:19.1
Uploaded:June 5, 2026 at 2:19PM UTC
File size:9.57 MB
Downloads:2
Version:19.0
Uploaded:May 29, 2026 at 3:19PM UTC
File size:9.57 MB
Downloads:6
Version:18.0
Uploaded:April 17, 2026 at 5:46PM UTC
File size:9.48 MB
Downloads:6
Version:17.0
Uploaded:March 20, 2026 at 8:52PM UTC
File size:13.38 MB
Downloads:11
Version:16.1
Uploaded:March 3, 2026 at 10:56PM UTC
File size:12.76 MB
Downloads:14
Version:16.0
Uploaded:February 7, 2026 at 10:32AM UTC
File size:12.76 MB
Downloads:18
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