Re: rc.local config question

To simply divert messages to the request-address that don't come from
current subscribers you can use the same mechanism smartlist uses to
restrict postings, i.e. formail/multigram and the dist file

(define $SPAMTRAP to be a file of your choice)

:0:
* !? formail -X"From " -xFrom: -xReply-To: -xSender: -xResent-From: \
           -xResent-Reply-To: -xResent-Sender: -xReturn-Path: | \
           multigram -b1 -m -l$submit_threshold -L$domain \
            -x$listaddr -x$listreq dist
$SPAMTRAP

if you want to be a little less restrictive you can use (as was mentioned
by Jim Osborn) an approach which uses SpamAssassin (SA) to check for the
spamishness of messages that aren't from subscribers:

WHITEU=dist
FROM = `formail -IReply- -rtzxTo:`

:0
* ! ? fgrep -i $FROM $WHITEU
{
  INCLUDERC=spamcheck.rc
}

-- where spamcheck.rc is tuned to whatever spam-finding package you
prefer, for instance a simple-minded (and low-volume) SA approach could
be:

:0fw
| /usr/local/bin/spamassassin

:0:
* ^X-Spam-Status: Yes
$SPAMTRAP


Rich