Delta Chat@lps @strypey @praveen The K-9 main developer @cketti is indeed working with Mozilla for two years now, together with a colleague, and they are building Thunderbird-Android -- we talk from time to time with @thunderbird folks but there are no joint dev plans. As to the precise relation of Thunderbird and Mozilla, it's better to ask/inquire with them but last we heart, they run on the administrative infrastructure of Mozilla, but Thunderbird has their own separate accounting/leadership.
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