catch-all UNMATCHED syntax

list Jm54601
Mon, 11 Aug 2008 13:10:08 -0700 (PDT)
Message-Id: <user-ef7ff882ea73@xymon.invalid>

Is it possible to set up the syntax in hobbit-alerts.cfg so the UNMATCHED receipient matches **only** unmatched hosts and does not show up on every host's info page?
This doesn't seem to work the way I would like:
HOST=* UNMATCHED
  MAIL user-418e6ddda362@xymon.invalid