Reputation-based DNSBL combining spam trap data and complaint signals. Also operates a whitelist (wl.mailspike.net) for senders with verified good sending ...
Scandinavian-origin DNSBL focused on spam sources identified via trap networks. Used as a scoring component in some Nordic mail infrastructure.
Sender Score reputation network from Validity. Assigns IPs a reputation score (0-100) rather than a binary listed/not-listed verdict. Used by major ESPs and ...
Formerly listed phishing and spam sources. Discontinued around 2013. DNS queries return NXDOMAIN. Historical reference only.
South African-origin DNSBL family covering IP (ivmsip), 24-hour recent spam (ivmsip24), and URI (ivmuri) zones. Primarily deployed in African and regional mail ...
Karma-based IP reputation system from JunkEmailFilter. Positive karma for good senders (whitelist), negative karma for spam sources (blacklist). Also operates ...
Harness the power of the Sender Score Reputation Network to monitor email trustworthiness and discover proven strategies for improving your sender reputation ...
Lists IPs that generate backscatter: misdirected delivery failure notifications (NDRs) sent to forged sender addresses. Operated by the same team as UCEPROTECT.
Automated blocklist fed by fail2ban reports from a network of participating servers. Lists IPs involved in brute-force attacks, SSH scans, and other network ...
Formerly a sender certification and reputation list from Habeas (acquired by Return Path). Discontinued when Return Path moved to different certification ...
