[news.admin] host.UUCP sans map entry

kyle@xanth.UUCP (Kyle Jones) (08/23/87)

There are articles being posted with From: headers of the form
  From: user@host.UUCP
but the host is not mentioned anywhere in the maps.

To the news administrators of sites that do this I ask: How are we
supposed to send e-mail responses to these articles?