I've run my own mailserver since the late 2000s. I've never had much trouble with deliverability. Spam hasn't been a real issue either --- I run with deliberate

I've run my own mailserver since the late 2000s. I've never had much trouble with deliverability. Spam hasn't been a real issue either --- I run with deliberately light spam filtering because I find the occasional ridiculous spam email hilarious. (My favorite spam of all time begins "Yes, I am Bernie Madoff".)