http://bugzilla.spamassassin.org/show_bug.cgi?id=3924





------- Additional Comments From [EMAIL PROTECTED]  2004-11-17 01:40 -------
There should always be a limit on the number of DNS queries a given message can
trigger, in order to protect the DNS servers and other infrastructure (including
local Net:DNS, local DNS servers, etc.) from overload.  

If the code can ignore "invisible" (unclickable) URIs (which I believe is
mentioned in ticket 3655 and 3680), that could make a usable solution.  There's
not much point in spammers including many *visible* URIs other than their own
since that dilutes their sales message.  However they do sometimes include
legitimate but unclickable URIs as "chaff".

Note that the old tickets 3655 and 3680 referred to body checks where URIDNSBL
formerly (3.0.0) applied to header checks.  Now that URIDNSBL is acting on
bodies (3.0.1), does that perhaps make 3655 and 3680 relevant in the handling of
empty anchors like <a href="http://whitehat-domain.com";></a>?  Is that perhaps
part of the current problem?



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