🚀 go-pugleaf

I was dismayed to see that my moderated group alt.med.cfs <=> CFS-L
mailing list was penetrated by the "FREE MONEY" essayist, who also posted
a similar message last year.  My group is moderated so that only
registered users may post directly.  A messages go through a Listserv
which is set for Send= Editor and Editor= (CFS-L).  I suspect that this
non-registered person (actually it was a forged, non-existant address) was
able to bypass my moderation scheme by posting to the newsgroup and
including their own Approved: line.  The gateway address NETNEWS@AMERICAN.EDU
is listed as a subscriber, naturally.

Does anyone know if in fact that is all that it takes?  Someone puts in an 
approved line, posts to the newsgroup side, and that message can then bypass 
the moderation set-up described above? 

Does anyone know of a way to block this?

Thanks for any help.

-- Roger Burns    cfs-news@cais.cais.com