KEMPTBL: Email Blocklist Removal Guide
A DNSBL zone associated with Kemp Technologies and Spamhaus network infrastructure. No longer actively maintained. DNS responses are unreliable.
Deliverability
0SPAM Blacklist: Email Blocklist Removal Guide
Independent DNSBL with both RBL (IP-based) and standard spam lists. Populated from trap networks and community reports. Used in some SpamAssassin configurations.
Anonmails DNSBL Removal: How to Delist Your IP from spam.dnsbl.anonmails.de
German DNSBL focused on anonymous mail relay abuse and spam sources. Used in German mail infrastructure.
CALIVENT: Email Blocklist Removal Guide
Blocklist that focused on malware-sending and compromised host sources. Discontinued. No longer operational.
DRMX: Email Blocklist Removal Guide
Small independent DNSBL. Discontinued. Historical reference only.
JIPPG: Email Blocklist Removal Guide
JumpStart Internet Packet Pro Guard — independent spam blocklist from the early 2000s. Long discontinued. Historical reference only.
Konstant: Email Blocklist Removal Guide
Part of the MAPS (Mail Abuse Prevention System) relay blocklist family. MAPS was acquired by Trend Micro and the public free DNSBL service was discontinued. Enterprise subscription only.
SERVICESNET: Email Blocklist Removal Guide
Small independent DNSBL that has been discontinued. Historical reference only.
Spamhaus DBL: Email Blocklist Removal Guide
Right-hand side domain blocklist targeting sending domains and URLs found in spam. Checked against the domain in the From: header and links in the message body. Used heavily by spam…
SpamCop BL: Email Blocklist Removal Guide
User-report-driven listing of IPs that sent spam to SpamCop trap addresses or were reported via the SpamCop submission interface. Widely integrated into spam filters, ESPs, and mail gateways.
Barracuda Reputation BL: Email Blocklist Removal Guide
IP reputation list maintained by Barracuda Networks, fed by over 200,000 spam sensors globally. Used natively by Barracuda email security appliances and optionally by any MTA via DNSBL query.
SORBS RHSBL: Email Blocklist Removal Guide
Domain-level blocklist from SORBS flagging sending domains associated with abusive behaviour. Acquired by Proofpoint in 2011; maintenance has been inconsistent since. Some filters still query it.
