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.Rbcheck - Open Relay database check - Enter an IP address or an rdns domain name and find out which blacklists (if any) list it.
MAPS Relay Spam Stopper (RSS) - The RSS is a list of email relays which have been used to send spam, for use in blocking spam by blocking mail which have gone through those sites.
Blacklist of Internet Advertisers - To curb inappropriate advertising on usenet newsgroups and via junk e-mail.
xbl.selwerd.cx (eXtreme spam Blocking List) - Providers that let users spam selwerd.nl, selwerd.cx, flits.rug.nl and other spamtraps and ignore reports, host spamvertized pages or pages selling spamware get listed. Using xbl.selwerd.cx risks missing a lot of legitimate e-mail.
The Arbitrary Blackhole List - This blacklist is designed to stop mail coming from known-spammers hosts.
Open Relay Database (ORDB) - A validated database of mail servers that permit third-party relay. Also in Francais, Nederlands and Dansk.
Open Relay Blackhole Zones (ORBZ) - ORBZ publishes , via DNS, a list of IP addresses of machines that they know to be open relays, even if they haven't yet been used to relay spam.
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.
MAPS Realtime Blackhole List (RBL) - Lists email sites which have refused to limit their relaying, leaving the potential for their use as spam gateways.
MAPS Dial-up User List (DUL) - An IP blacklist of dialup-using "stealth" spammers and email trespassers.
Spamware vendor list - List of known spamware vendors and their ISPs.
OpenRBL DNS Lookup - Enter an IP address or a hostname to find out which blacklists (if any) list it.
Keenan's List of Spamming Scumbags! - A list of active websites that have advertised using theft of service in the form of unsolicited commercial email.
RBL-Type Services - A listing of sites offering spam-related filter / blackhole lists. There are a growing number of services you can use for filtering your inbound mail.
OsiruSoft Open Relay Spam Stopper - DNS-based lists including verified open relays, dialup spam sources, confirmed spam sources, spamware developer sites, list servers that automatically opts users in without confirmation, and open proxy servers.
SpamCop - Blocking List Information - 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).
Dorkslayers - Manually managed list of open relays which physical location is NOT within the United States of America (USA) and that are not contained in dorkslayers spite list.
Fabel - Relaytest - List of open relays. Only one kind of test is done to see if the mail is relayed or not.
Relays.visi.com - We generate a list of open relaying mail servers that have transmitted spam to us, or our friends. If you desire, you may use this list to refuse mail from those servers.
Spamhaus Block List (SBL) - 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.
The Spamhaus Project Register of Known Spam Operations (ROKSO) - The Spamhaus Project's Register Of Known Spam Operations (ROKSO) Database. ROKSO collates evidence on known hard-line spam outfits that have been thrown off Internet Service Providers 3 times or more.
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 a grasp of the size of the various blacklists. Maintained by Jeff Makey.
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 servers from multi-stage open relay chains and single stage open relays not listed on ORBZ.
The Blitzed IRC Networok - A dnsbl of open proxies (HTTP, Socks and wingate), populated by IRC connection scanners and spamtraps.
Clueless Mailers - Offers background information on the worst of the new Internet abusers.
