Ask HN: Is there a tool to extract ALL emails, learn "me", draft responses

I'm looking for a product or startup that can extract all my emails, use GPT-4 to learn "me," then draft responses. It would be nice if it also had other integrations, like Slack, Messenger, Twilio, Todoist, etc., and could extract all those too for a complete second-brain/sidekick/assistant-like replacement of me. I want to grow my side projects, but 80% of my day is just managing day-to-day issues which AI can handle if it knew me.

And the key point is to update the knowledge base with each new email, whether sent or received.