Thunderbird, the open-source email application, is coming to Android thanks to the K-9 Mail Android email app project, which is joining Thunderbird to become the Thunderbird Android email app.

The Android 15 source code will be released next week, according to multiple sources. Here's what that means for users and developers.

K-9 Mail project maintainer Christian Ketterer (who goes by "cketti" in the OSS community) will join the Thunderbird team, and over time, K-9 Mail will become Thunderbird for Android.