alt Hacker NewsNearly all the spam I get has an email address from those providers.
Seems they are the disease not the cure
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Mine isn't from those email hosts, but it from google cloud or Azure typically (not AWS for whatever reason). Related, the gmail spam filter is terrible.
I think you misunderstand the disease.
What this is called is survivorship bias. The question I would ask is how much mail are you not seeing at all because it's dropped at the edge first thing because it's IP block listed?
Next, how much spam are you seeing from them because they and Google are the largest providers on Earth? Kind of like selecting a random person from the population in the US and going "look, it's a white guy". Yea, that's how statistics works.
Lastly, because the are good at blocking spam at the edge, then that's the last bastion of attack for spammers to put their efforts in if they want any return at all.
I'm the sysadmin at my company and we regularly get emails spoofing our own addresses! It's wild that Microsoft can't even protect customers when they have all the info to do so.