Format of commands to .forward file?

[John Antypas @ UC San Diego]

Does anyone out there have handy the types of commands that can
be placed in a 4.2BSD .forward file?  I know about the acct-name that
forwards mail to acct-name, but what about forwaring mail to a
pre-processing program, What do this mean?

/<user path>
" | <progname> <args>"

What does the error

/<user path> Can't create output
mean?  How can it be fixed?  I am trying to use the infamous
cmdbymail.c program posted recently.  Anyone on 4.2BSD had 
any luck with this.

John Antypas
UC San Diego

uucp: ...!{ucbvax,noscvax,decvax,ihnp4,dcdwest}!sdcsvax!sdcc6!ix255
arpa: ix255%sdcc6 at sdcsvax.ARPA
bitnet: ix255%sdcc6%sdcsvax.ARPA at WISCVM.BITNET (user SMTPUSER)
csnet: ix255%sdcc6%sdcsvax.ARPA at CSNET-RELAY