BEST PRACTICE | DNSBLs and email filtering - how to get it right
https://www.spamhaus.org/resource-hub/email-security/best-practice-dnsbls-and-email-filtering-how-to-get-it-right/
WEBJan 27, 2021 · Domain Name System Blocklists (DNSBLs) are a low-cost and effective way of stopping the torrent of inbound email traffic associated with spam and other malicious emails. There are multiple benefits to using blocklists, reducing infrastructure costs, and workforce hours to increasing catch rates .
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