I am struggling a bit to find information about BIMI that isn't some marketing crap. But from what I can tell most major email providers (except Microsoft for s

I am struggling a bit to find information about BIMI that isn't some marketing crap. But from what I can tell most major email providers (except Microsoft for some reason) are on board. But are other providers adding this checkmark? I am curious why they seem to have chosen the same style as Twitter given the complete lack of trust that has eroded with that, so if others are going to use this checkmark was this an agreed to style or did Google just choose this? I guess I can kinda see the value of this, especially since I could see telling my parents that unless it has this checkmark don't trust it for anything serious. But that only works if this is something that they all agreed to do across the board regardless of what platform you are using to read your email.