I host my own email and reputation has been a huge problem. I don’t send spam, but they just block whole subnets. When I fill out the appeal form, I never hear back and nothing ever happens. It is very frustrating. I’m using DKIM, SPF, and all the other stuff. Still having problems. :(
It’s working pretty smoothly for me. I set it up a while ago, so if I encountered any problems I don’t remember them.