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Help server to reject connections from likely spammers
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DNS used to query database
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MAPS (mail-abuse.org)
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RBL: Known, recalcitrant spammers
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DUL: Dial-up lines
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RSS: Open relays with history of spam relaying
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RBL+: Combined database for fast lookups
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Charge for all but individual use as of 7/31/2001
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ORBS (defunct as of 3Q 2001)
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A blacklist with "attitude." Blocked any server that refused
to be probed for relaying
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Since the demise of ORBS, several similar, mostly free blacklists
have been created. (See paper)
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Sendmail macros for common blacklists:
FEATURE(dnsbl,`blackholes.mail-abuse.org',`RBLed! see http://www.mail-abuse.org/rbl/')dnl
FEATURE(dnsbl,`dialups.mail-abuse.org',`Dialup! see http://www.mail-abuse.org/dul/')dnl
FEATURE(dnsbl,`relays.mail-abuse.org',`Open relay! See http://www.mail-abuse.org/rss/')dnl
FEATURE(dnsbl,`inputs.ordb.org',`Open relay! See http://www.ordb.org/')dnl
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