https://www.spamhaus.org/blocklists/spamhaus-blocklist/
Spamhaus Blocklist (SBL) | IP DNSBL for effective email filtering
Spamhaus Blocklist contains IPs identified as sending spam, hosting malicious content, hijacking IP space, or acting like a bulletproof hosting company.
effective email filteringsbl
https://www.spamhaus.org/blocklists/policy-blocklist/
Policy Blocklist (PBL) | DNSBL for effective email filtering
A dataset containing end-user IP address ranges from which email should never be sent directly to the final destination.
effective email filteringpbl