Ghoelian

That’s the one. I dong get any insights either, but iirc it did stop my emails from automatically going to spam. It’s been a while though, and I remember trying a whole bunch of different things, but I believe that’s what eventually fixed it.

Though now that I think about it, I did have to register my domain with Google in some way to stop being flagged as spam iirc.

I also self hosted for years (using tuta mail with my own domain now), and have never had issues with my deliverability either.