[anti-abuse-wg] What to do when both RIR and ISP don't care?

     Actually, the problem also exists within EU itself.  For example,
the followining address has been having problem since a long time and
nobody cares.
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The following recipient(s) cannot be reached:

      abuse at auna.es on 2009.04.21 10:16
            There was a SMTP communication problem with the
recipient's email server.  Please contact your system administrator.
            <mailhost.futurmaster.com #5.5.0 smtp;550 Relaying denied.>