[reSIProcate] What does DNS blacklisting mean?

[Dave Mason]

Hi,

Hate to ask a noob question, but what does it mean when a DNS query result
gets blacklisted?  I saw on the web page it has something to do with a
transmit failure, so I assume I shouldn't use the tuples that get returned
in the query results vector.  If those results are bad, why do they still
get returned?  Is there a status flag I should check before using them?

Regards,
Dave