What are you doing to constantly have to fight the blacklists?! I've been operating my own mailserver for over a decade and I haven't ever had to remove my IP

What are you doing to constantly have to fight the blacklists?! I've been operating my own mailserver for over a decade and I haven't ever had to remove my IP addresses from any blacklists, and I haven't ever heard such a thing from other people I know who are operating their own mailservers either.