> Because of such things like DKIM, I really don't have an email spam problem, or if I do, it is because I signed up for it myself. Running home and work mail

> Because of such things like DKIM, I really don't have an email spam problem, or if I do, it is because I signed up for it myself. Running home and work mail servers, I would disagree. If I let my shields down, I get kajillions of spam emails from snowshoe [0] spam operators (assuming it's not all the same operation!), coming from hundreds of IP addresses in dozens of /24s, all with random word salad domain names, valid DKIM, and valid DMARC, with domain registrations that lead nowhere. Blocking whole /24s and certain egregious TLDs is the only way to stem the tide. As long as there are ISPs, colo/cloud providers, and registrars who are willing to pocket the cash and look the other way, nothing's going to improve. [0] https://www.spamhaus.org/faq/section/Glossary#233 https://www.spamhaus.org/faq/section/Glossary#233