The popular open-source email client, Mozilla Thunderbird, has just launched a beta version of its Android app. This release, version 8.0b1, is available as a pre-release with a range of new features and improvements.
This beta release introduces the official Thunderbird for Android branding, moving away from its previous identity as K-9 Mail. For those already using K-9 Mail or a previous Thunderbird for Android build, migrating settings to the new version is now a seamless process.
See https://ostechnix.com/thunderbird-lands-on-android-with-new-beta-release