spamassassin-dev December 2011 archive
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spamassassin-dev: [Bug 6724] DNS Blacklistsreturning purposefull

[Bug 6724] DNS Blacklistsreturning purposefully wrong answers as part of Anti-Abuse / Free for Some Policies

From: <bugzilla-daemon_at_nospam>
Date: Tue Dec 13 2011 - 19:01:28 GMT

--- Comment #14 from Darxus <> 2011-12-13 19:01:28 UTC ---
Steve Freegard pointed out on IRC this additional bit of relevant BCP draft:

   Note: In Section 3.4 it is noted that some DNSBLs have shut down in
   such a way to list all of the Internet. Further, in Section 3.5,
   DNSBL operators MUST NOT list Therefore, a positive
   listing for SHOULD indicate that the DNSBL has started
   listing the world and is non-functional. Similarly, a domain-based
   DNSBL SHOULD NOT ever list the reserved domain INVALID, and a
   positive listing for INVALID SHOULD indicate that the DNSBL is non-

He also pointed out that it's only a draft.

There's also: "If this indicator is missing (query of returns
NXDOMAIN), the DNSBL should be considered non-functional."

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