SEM Blacklists: Email Blocklist Removal Guide
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 filtering systems.
Blacklist Removal
IVM Blacklists: Email Blocklist Removal Guide
South African-origin DNSBL family covering IP (ivmsip), 24-hour recent spam (ivmsip24), and URI (ivmuri) zones. Primarily deployed in African and regional mail infrastructure.
Backscatterer Removal: How to Delist Your Mail Server from ips.backscatterer.org
Lists IPs that generate backscatter: misdirected delivery failure notifications (NDRs) sent to forged sender addresses. Operated by the same team as UCEPROTECT.
HIL Blacklist: Email Blocklist Removal Guide
Formerly a sender certification and reputation list from Habeas (acquired by Return Path). Discontinued when Return Path moved to different certification models.
DroneBL: Email Blocklist Removal Guide
Lists IPs operating as botnet drones, open proxies, and compromised hosts. Oriented toward IRC network abuse but used in some mail filter configurations.
RATS Blacklists: Email Blocklist Removal Guide
Family of IP blocklists covering dynamic IPs (RATS-Dyna), confirmed spam sources (RATS-Spam), and IPs with no PTR record (RATS-NoPtr). Used in SpamAssassin and Postfix configurations.
NETHER Blacklists: Email Blocklist Removal Guide
Formerly listed open relays (RELAYS zone) and uncertain mail sources (UNSURE zone). Has not been actively maintained since the mid-2010s. Still queried by some legacy SpamAssassin configurations.
