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 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.
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 Francais, Nederlands and Dansk.
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") which contain domains or IP networks whose administrators choose not to obey the RFC's, the building block "rules" of the net.
The South Korea Blocking List
Blocking list to filter out Korean spam.
Spam & Open Relay Blocking System (SORBS)
Lists Open Relays and Open Proxies (Open HTTP Proxy Servers and Open SOCKS Proxy Servers). SORBS only scans a host when it attempts to send mail to one of the feeder servers.
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 of the Month
Makes examples of people who feel the need to send unsolicited emails. Sample emails and follow-up information.
Spambag.org
Personal (DNSBL) list of abusive networks that the author blocks from sending mail or accessing his web 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).
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 over three times.
Spamikaze
Automated spam blocklist system, designed to block spam at the SMTP level.
Spamware Vendor List
List of live spamware sites and related links.
UCE Protect Network
Attempt to generate a free realtime black list of spammer IP numbers.
Whois-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.
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.
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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