First part is repeating myself (Where did I say you need to be isp?!! Injecting something false and then arguing about it...), second part google does check rev

First part is repeating myself (Where did I say you need to be isp?!! Injecting something false and then arguing about it...), second part google does check reverse dns. I am running self hosted mail server on broadband static ip for close to 20 years and until the reverse resolve was done I was categorically thrown into spam on gmail. DKIM or not. Once the reverse DSN was set it stopped (after a while)... Well just google it you have enough of showcases there.