It had an email for uverse at the bottom which I am pretty sure is residential? Idk

That doesn’t seem that difficult?

https://www.falconitservices.com/att-comcast-and-reverse-dns-ptr-request/

I don’t really stay on top of my gmail that often, but my spam folder has basically exactly the same stuff in it that my inbox has. Just a bunch of random emails from services that I signed up for an account on or bought something from and none of which I particularly care about. There’s not really much that I can tell differentiating what gets marked as spam or not either.