Blacklists
AntiSpam DNSBL
Identifies spam sources - whether intentional or not - at the time they are sending spam. Not before and not after.
bl.csma.biz - Spam Blacklist
As a public service, McFadden Associates maintains a free DNSBL blacklist. Anyone sending SPAM into their mail filters is automatically added for a period of thirty days.
Blackholes.us
Publishing a variety of DNS blocklists including entire countries and ISP's.
Blacklists Compared
Weekly reports of DNS blacklists lookups of IP addresses (and reverse DNS lookups) that made SMTP connections to the San Diego Supercomputer Center on that week. Useful for getting…
Blockalert
Provides reports on whether there is recent spam activity within each IP block, especially spamvertised web site addresses. Check if you are sharing your address block with spamme…
Chinese and Korean Net Blocks
Lists IP blocks of China and Korea for those who want to avoid asian spam.
Composite Blocking List (CBL)
The CBL is a DNSBL which takes its source data from very large spamtraps, and lists IPs of open proxies and worms/viruses.
Distributed Server Boycott List (DSBL.org)
This list contains email servers which are non-secure and potentially servers with dumb and/or malicious users. It is purely composed of data DSBL receives; DSBL should never send …
Drbcheck: Dr. Jørgen Mash's DNS Database List Checker
Lists all DNSbl's (RBL's) and enables users to make a query against all the lists.
Electric Eye Ultimate Banned List
A manually updated and verified online database of spammers. Provides email address and domain blocklist.
Five Ten - Local Black Holes
Blacklist that includes dialup equivalent ip addresses, individual spam sources, netblocks that refuse to remove spammers, bulk mailers that don't require confirmed opt-in, output …
ip4r (DNSBL-style) DNS lookups
List, in table form, of blacklists. Includes table with the name of the blacklists, their lookup domains, the IP that is returned in case of a match and a description.
Mail Abuse Prevention System
MAPS aims to defend the Internet from spammers by educating ISPs and providing real time blocking lists of known spam sources.
MailPolice RHS-BL
RHS-style lists of domains which have sent spam to MailPolice customers. Currently divided into two lists, bulk senders - domains associated with bulk mail - and pornography - doma…
Not Just Another BlackList (NJABL.ORG)
Spam blocking blacklist of open relays, dial-ups, and direct spam sources.
Open Relay Database (ORDB)
A validated database of mail servers that permit third-party relay. Also in French, Dutch and Danish.
rfc-ignorant.org
The home for domains who don't play by the rules. A number of lists (at present "dsn", "abuse", "postmaster", "whois" and "ipwhois&quot…
Spam Prevention Early Warning System (SPEWS)
SPEWS maintains a list of known spam sources and spam friendly hosts so that e-mail can be rejected from these problem sites.
Spam Support Permanent Blocklist
A permanent blocklist of spam supporting web hosts and ISPs.
Spambag.org
Personal (DNSBL) list of abusive networks that the author blocks from sending mail or accessing his web servers.
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