Robuta

https://www.spamhaus.org/resource-hub/email-security/if-you-query-the-legacy-dnsbls-via-cloudflares-dns-move-to-spamhaus-technologys-free-data-query-service/
email securitycloudflare dnsquerydnsblsvia
https://www.hornetsecurity.com/en/knowledge-base/blacklists/
Definition and examples of blacklists, RBL (Realtime Blackhole List) or DNSBL (Black List DNS).
blacklistsdnsbls
https://www.spamhaus.org/faqs/?section=Glossary
Find frequently asked questions relating to Spamhaus' data and research, offering general and best practices.
faqsdeliverabilitydnsblsmalwarereputation