I don't agree, but it is true that some aggressive DNS RBL may include Digital Ocean, for example, just because [1]. The point is not that much that there are

I don't agree, but it is true that some aggressive DNS RBL may include Digital Ocean, for example, just because [1]. The point is not that much that there are such blocking lists, the point is why admins use them. Surely that's blocking a good chunk of spam, but also legit sites. 1: "As you should know now: It is not you, it is your complete provider which got [redacted] listed."