Assuming I'm reading this right :) the difference is that FILTER_ALSO
disallows specified users the right to post or subscribe to lists on
the server, whereas TRAPIN is a list of addresses from which LISTSERV
flatly refuses to accept <any>  mail and TRAPOUT is a list of addresses
to which LISTSERV should never send mail (instead it sends such mail
to the postmaster).  TRAPIN and TRAPOUT were provided under VM to help
in situations involving brain-damaged mailers.  I suppose TRAPIN could
be used to stop robots or *@IAF.NET from being able to send ANYTHING to
LISTSERV, but I don't know as I'd advise it.
 
Nathan
 
On Wed, 15 Nov 1995 19:08:22 EST LISTSERV Administrator said:
>Okay, admitting some ignorance here...
>
>I'm not sure I understand the difference between FILTER_ALSO and
>TRAPIN/TRAPOUT.  Someone (Nathan? Eric?) care to enlighten me and
>anyone else who doesn't get the difference?
>
>(For list owners, this is a LISTSERV administration thing... not to
>be confused with the Filter= keyword.)
>
>Thanks!
>-Holly