Saying Goodbye to K-9 Mail: A 15-Year Open Source Journey

From contributing code in 2009 to leaving Mozilla in 2025, the author reflects on their 15-year journey with K-9 Mail and Thunderbird for Android. Starting with personal contributions, they became a core maintainer, even crowdfunding to support full-time development. After successfully releasing Thunderbird for Android, the author chose to leave, embarking on a new chapter, but expressing a potential return as a volunteer contributor.