Resources - Blacklists

Abusive Hosts Blocking List
http://www.ahbl.org/

The AHBL is operated by the Summit Open Source Development Group, a group of software developers, system administrators, network administrators, and regular computer users who work together for the common good of the Internet.

CBL - Composite Blocking List
http://cbl.abuseat.org/

The CBL takes its source data from very large spamtraps/mail infrastructures, and only lists IPs exhibiting characteristics which are specific to open proxies of various sorts (HTTP, socks, AnalogX, wingate etc) and dedicated spam-bots which have been abused to send spam, worms/viruses that do their own direct mail transmission, or some types of trojan-horse or "stealth" spamware, dictionary mail harvesters, etc.

Distributed Checksum Clearinghouse
http://www.dcc-servers.net/

The DCC, or Distributed Checksum Clearinghouse, is an anti-spam content filter based on fuzzy checksum algorithms that have evolved as spam is altered slightly between recipients (as spam automation becomes more sophisticated) to evade simple filters.

LumberCartel - for the benefit of the Internet community
http://www.lumbercartel.org/

LumberCartel.org operates a number of DNS-Based Blackhole Lists for the benefit of the Internet community.  [Although they appear to be based in the USA, we're not making any assumptions.]

MAPS - Stopping spam at its source
http://www.mail-abuse.com/

MAPS was founded in late 1996 to pioneer the development of anti-spam technology and network policies.  As the original anti-spam company, MAPS has become the industry leader in providing network layer spam blocking services.  The executive team's insight into how companies grappled with the growing dilemma of spam flowing into and around the Internet led to the creation of the MAPS RBL+® (Realtime Blackhole List) Master Service.

NJABL - Not Just Another Bogus List
http://www.njabl.org/

The NJABL effort began out of frustration with the amount of spam coming into the operators' networks.  They maintain a list of known and potential spam sources (open relays, open proxies, open form to mail HTTP gateways, dynamic IP pools, and direct spammers) for the purpose of being able to tag or refuse eMail and prevent at least some spam.

ORDB.org - Open Relay Database
http://www.ordb.org/

ORDB.org is the Open Relay Database.  ORDB.org is a non-profit organisation which stores IP-addresses of verified open SMTP relays.  These relays are, or are likely to be, used as conduits for sending unsolicited bulk email, also known as spam.  By accessing this list, system administrators are allowed to choose to accept or deny email exchange with servers at these addresses.

PSBL - Passive Spam Block List
http://psbl.surriel.com/

An easy-on, easy-off blacklist that doesn't rely on testing.  Any user can remove their ISP's mail server from the list.  The idea is that 99% of the hosts that send spam never send legitimate eMail, but that people whose mail server was used by spammers should still be able to send eMail.

RSL - Relay Stop List
http://relays.visi.com/

The VISI.com RSL is a DNS-based list of mail servers that have relayed third-party spam within the recent past.  If you run a mail server, you can use this list to refuse mail from those servers.  People often block mail from these "open relay" mail servers on the premise that where some spam has traveled, more is likely to follow.

The vast majority of RSL data is compiled on an automated basis, primarily through the use of spamtrap addresses.  This data is gathered for the purpose of benefitting VISI.com customers in their spam filtering and blocking efforts, but is offered free of charge to the greater Internet community, for as long as we have the resources to spare.

SORBS.net - Spam and Open Relay Blocking System
http://www.sorbs.net/

SORBS is an acronym for Spam and Open Relay Blocking System.  This is not strictly accurate as a description though, as it stops Open Proxy servers and machines that appear to be hacked sorces of spam, as well as Open Relays.

SpamCop.net - protecting the internet through technology
http://spamcop.net/

Beware of cheap imitations!  SpamCop has been protecting the internet community since 1998.  Automatically file spam reports with the network administrators who can stop unsolicited email at the source.  Subscribe, and filter your email before it reaches your inbox.

Spamhaus Project, The - working to protect internet networks worldwide
http://www.spamhaus.org/

Spamhaus tracks the Internet's Spammers, Spam Gangs and Spam Services, provides dependable realtime anti-spam protection for Internet networks, and works with Law Enforcement to identify and pursue spammers worldwide.

SPEWS.org - the internet's Spam Prevention Early Warning System
http://www.spews.org/

SPEWS is a list of areas on the Internet which several system administrators, ISP postmasters, and other service providers have assembled and use to deny eMail and, in some cases, all network traffic from.

UCEPROTECT®-Network - Germany's first Spam protection database
http://www.uceprotect.net/

The idea behind UCEPROTECT®-Network is that abusers should be given no chance to clean up their act.  Although it's unrealistic to educate all internet users to secure there computers, it certainly is possible to force internet administrators, providers, and carriers to take preventive measures against eMail abuse.  ...

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