I hope it helps eliminate every bad actor on their network. Because their abuse department is useless, ignores all reports. The problem is there are also blog

I hope it helps eliminate every bad actor on their network. Because their abuse department is useless, ignores all reports. The problem is there are also blog/forum spammers on their network, hundreds if not thousands and I doubt this filter is meant to detect them, sounds like only a port 25 thing.