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 The Abusive Hosts Blocking List (AHBL)The Abusive Hosts Blocking List (AHBL)
 Publishes a list of known abusive hosts (open relays, open proxies, spam sources, DoS drones, and more) in various forms including a DNSbl.
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Blacklists ComparedBlacklists 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.
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bl.csma.biz - Spam Blacklistbl.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.
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BlockalertBlockalert
 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 spammers.
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Chinese and Korean Net BlocksChinese and Korean Net Blocks
 Lists IP blocks of China and Korea for those who want to avoid asian spam.
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Composite Blocking List (CBL)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.
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Distributed Server Boycott List (DSBL.org)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 out data by itself.
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Drbcheck: Dr. Jørgen Mash's DNS Database List CheckerDrbcheck: 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.
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Electric Eye Ultimate Banned ListElectric Eye Ultimate Banned List
 A manually updated and verified online database of spammers. Provides email address and domain blocklist.
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Five Ten - Local Black HolesFive 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.
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Mail Abuse Prevention SystemMail Abuse Prevention System
 MAPS aims to defend the Internet from spammers by educating ISPs and providing real time blocking lists of known spam sources.
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MailPolice RHS-BLMailPolice 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 - domains associated with sending and hosting pornographic content.
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Not Just Another BlackList (NJABL.ORG)Not Just Another BlackList (NJABL.ORG)
 Spam blocking blacklist of open relays, dial-ups, and direct spam sources.
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rfc-ignorant.orgrfc-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") which contain domains or IP networks whose administrators choose not to obey the RFC's, the building block "rules" of the net.
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Spam Support Permanent BlocklistSpam Support Permanent Blocklist
 A permanent blocklist of spam supporting web hosts and ISPs.
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SpamCop - Blocking List InformationSpamCop - 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).
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Spamhaus Block List (SBL)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.
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The Spamhaus Project Register of Known Spam Operations (ROKSO)The Spamhaus Project Register of Known Spam Operations (ROKSO)
 ROKSO collates evidence on known hard-line spam outfits that have been thrown off Internet Service Providers over three times.
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SpamikazeSpamikaze
 Automated spam blocklist system, designed to block spam at the SMTP level.
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Spamware Vendor ListSpamware Vendor List
 List of live spamware sites and related links.
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TQM3 Real Time DNSBL & Spam TrapTQM3 Real Time DNSBL & Spam Trap
 Provides tools and instructions for maintaining a local real-time DNS blacklist, online spam database, graphs, and blacklists for download via ftp and rsync.
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UCE Protect NetworkUCE Protect Network
 Attempt to generate a free realtime black list of spammer IP numbers.
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Whois-Details for Blacklisted Spam DomainsWhois-Details for Blacklisted Spam Domains
 List of domains that have been advertised via spam, with name server, registration date, registrant. This list is updated daily.
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