Is there a self hosted email solution? nostr:npub126ntw5mnermmj0znhjhgdk8lh2af72sm8qfzq48umdlnhaj9kuns3le9ll https://image.nostr.build/a121a90a2689c27a568ec9b4ef90eb5d75bf2dedc1e546a6d700ca14252929b0.jpg