This list contains IP addresses which have been reported to SpamCop as carriers of spam (source of e-mail or verified, open relay). Some of these reports now come from spamtraps (email addresses used strictly to receive spam).

The home for domains who don't play by the rules. A number of lists (at present "dsn", "abuse", "postmaster", "whois" and "ipwhois") which contain domains or IP networks whose administrators choose not to obey the RFC's, the building block "rules" of ...

ROKSO collates evidence on known hard-line spam outfits that have been thrown off Internet Service Providers over three times.

All IPs on the SBL belong to known spammers, spam gangs, or spam support services. The SBL includes IPs from both the ROKSO database and IPs of spam services listed in the Spamhaus database.

MAPS aims to defend the Internet from spammers by educating ISPs and providing real time blocking lists of known spam sources.

The CBL is a DNSBL which takes its source data from very large spamtraps, and lists IPs of open proxies and worms/viruses.

Spam blocking blacklist of open relays, dial-ups, and direct spam sources.

A realtime URI blacklist served via DNS to identify unsolicited bulk and commercial messages based on the links within the e-mails. Distributed under the Apache open source license.

Lists all DNSbl's (RBL's) and enables users to make a query against all the lists.

Publishes a list of known abusive hosts (open relays, open proxies, spam sources, DoS drones, and more) in various forms including a DNSbl.