Team Cymru Bogons: Email Blocklist Removal Guide
Lists bogon IP ranges: IP address space that should never appear as a source address on the internet. Includes unallocated IANA ranges and reserved space. Not a spam list.
Deliverability
ZapBL: Email Blocklist Removal Guide
Independent DNSBL listing spam sources and open relays. Used by a subset of mail server operators and SpamAssassin configurations.
IBM DNS Blacklist: Email Blocklist Removal Guide
Listed IPs associated with botnet-driven spam and malware distribution. Operated by an independent researcher known as Janit0r. Shut down in 2019 when the operator ceased maintenance. MTA queries ...
RBL.JP: Email Blocklist Removal Guide
Japanese DNSBL covering spam sources affecting Japanese mail systems. Primarily deployed in Japanese ISPs and corporate mail environments.
NoSolicitado: Email Blocklist Removal Guide
Latin American blocklist targeting spam affecting Spanish-language email users. Primarily deployed in Spanish and Portuguese-speaking regions.
SWINOG Blacklist: Email Blocklist Removal Guide
Swiss network operators group blocklist. Maintenance has become inconsistent. Primarily historical relevance to Swiss email infrastructure.
S5H.NET Blacklist: Email Blocklist Removal Guide
Simple independent DNSBL listing IPs that send mail to S5H.net's trap network. Low maintenance overhead for operators, automatic listing and expiry.
Schulte Blacklist: Email Blocklist Removal Guide
Independent DNSBL operated by a German researcher. Has been discontinued. DNS queries return NXDOMAIN or SERVFAIL. Historical reference only.
TRIUMF Blacklist: Email Blocklist Removal Guide
Internal blocklist operated by the TRIUMF particle physics laboratory in Vancouver. No longer actively maintained or publicly deployed.
TRUNCATE: Email Blocklist Removal Guide
The highest-severity tier of GBUdb's IP reputation system. Lists IPs with so poor a reputation that no legitimate mail has been observed from them. Used by SpamStopsHere and enterprise mail…
Woody’s SMTP Blacklist: Email Blocklist Removal Guide
Small independent Swiss SMTP blacklist. Discontinued. DNS queries no longer return valid responses. Historical reference only.
FABELSOURCES: Email Blocklist Removal Guide
Dutch DNSBL that was part of the FabelSources anti-spam project. Discontinued. No longer operational.
