Blocklists

Firewall

• https://www.spamhaus.org/drop/drop.txt

Possible Firewall

• https://github.com/firehol/blocklist-ipsets - http://iplists.firehol.org/
• https://github.com/CHEF-KOCH/CKs-FilterList
• https://www.dnsbl.info/dnsbl-list.php

Spam

• https://www.rackaid.com/blog/email-blacklists/