https://issues.apache.org/SpamAssassin/show_bug.cgi?id=6335

--- Comment #66 from Jeff Chan <[email protected]> 2010-03-04 10:56:21 UTC ---
(In reply to comment #64)
> Oh, and given Spamhaus chooses to actively fight useless traffic by
> deliberately returning FPs for IP lookups, they most likely wouldn't be happy
> about multiple lookups like co.cc and foo.co.cc either.
> 
> Dilemma. Strip registrar boundaries, as we used to. Or introduce code to not 
> do
> that, specifically for DBL.

Spamhaus would like DBL to be thought of as a new type of list, so perhaps a
new rule might be appropriate than trying to modify urirhssub.  Some of the
differences between a URIBL and DBL are:

1.  No URI IPs in DBL.  DBL is not a URI list; it's a domain list.

2.  IPs in URIs should be checked in SBL instead of DBL.  Obviously this
complicates URI handling somewhat.

3.  DBL uses wildcards, therefore domain stripping by the mail filter
application is not necessary.  This simplifies the application, but it may have
a negative impact on on-rbldnsd DNS caching, for example BIND forwards.

A relevant question is whether these differences are enough to justify a new
rule.

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