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The Spamhaus Project is an international organisation based in the Principality of Andorra, founded in 1998 by Steve Linford to take action against what they allege to be spammers. The correctness of this assessment by Spamhaus is regularly disputed. If the assessment is based on objective characteristics or on standards set by Spamhaus itself ...
Composite Blocking List. In computer networking, the Composite Blocking List ( CBL) is a DNS-based Blackhole List of suspected E-mail spam sending computer infections.
SORBS is owned by Proofpoint, Inc. SORBS (" Spam and Open Relay Blocking System ") was a list of e-mail servers suspected of sending or relaying spam (a DNS Blackhole List ). It had been augmented with complementary lists that include various other classes of hosts, allowing for customized email rejection by its users.
spamcop .net. SpamCop is an email spam reporting service, allowing recipients of unsolicited bulk or commercial email to report IP addresses found by SpamCop's analysis to be senders of the spam to the abuse reporting addresses of those IP addresses. SpamCop uses these reports to compile a list of computers sending spam called the "SpamCop ...
The Abusive Hosts Blocking List. The Abusive Hosts Blocking List ( AHBL) was an internet abuse tracking and filtering system developed by The Summit Open Source Development Group, and based on the original Summit Blocking List (2000–2002). Its DNSBLs were shut down on Jan 1, 2015 and now appear to be blacklisting the entire Internet.
Not Just Another Bogus List. Not Just Another Bogus List (NJABL) was a DNS blacklist . NJABL maintained a list of known and potential spam sources ( open mail 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 e-mail and thereby block spam from certain ...
Domain Name System blocklist. A Domain Name System blocklist, Domain Name System-based blackhole list, Domain Name System blacklist ( DNSBL) or real-time blackhole list ( RBL) is a service for operation of mail servers to perform a check via a Domain Name System (DNS) query whether a sending host's IP address is blacklisted for email spam. [1]
Anti-spam techniques. Various anti-spam techniques are used to prevent email spam (unsolicited bulk email). No technique is a complete solution to the spam problem, and each has trade-offs between incorrectly rejecting legitimate email ( false positives) as opposed to not rejecting all spam email ( false negatives) – and the associated costs ...