DNS Blocklists

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DNS Blocklists are a common form of network-accessible database used in spam detection. They're also referred to as "DNSBLs", "DNS Blacklists" and "RBLs". (The latter usage is

incorrect for the general case, as

 incorrect; see \["RBL"

is a trademark of MAPS, LLC

\].)

SpamAssassin includes support for many of the bigger DNSBLs, with optimal scores (or at least, optimal as determined by the GeneticAlgorithm).

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