Email blacklists
Plain-language reference for the IP and domain blacklists DomainCare probes on every blacklist check. Each page covers what the blacklist detects, the listing-category response codes, and the concrete delisting steps.
Domain reputation list focused on URLs found in unsolicited mail. SURBL is one of the most widely deployed domain blocklists at receivers.
multi.surbl.orgReal-time domain blacklist focused on URIs that appear in spam. Common at receivers using SpamAssassin and similar filters.
multi.uribl.comSpamCop Blocking List — IP blacklist driven by reports submitted by mail recipients.
bl.spamcop.netIP blacklist focused on compromised hosts — drones, open proxies, brute-force attackers — rather than spam senders.
dnsbl.dronebl.orgCommunity-driven IP blacklist aggregating fail2ban-style attack reports from operators worldwide.
bl.blocklist.dePassive Spam Block List — automatic IP listings based on spam-trap captures, no manual review.
psbl.surriel.com