mouss wanted us to know:

Sure. But technically, I fibbed a little. It doesn't do the header checks to make sure that the recipient is listed in the To or Cc. I've yet to add that. But here is what is working for me at this point.

# Global maildrop filter file

logfile "/var/log/maildrop.log"

DEFAULT="$HOME/Maildir/"

`test -f $HOME/vacation.msg` if ( $RETURNCODE == 0 ) { log "Vacation mode, normal email delivery to $LOGNAME:" cc $DEFAULT

/^Precedence:.*/ if ( $MATCH =~ /bulk|list|junk/ ) { log "No vacation message: $MATCH" exit }

/^(X-BeenThere|X-Loop|Mailing-List|Auto-Submitted):.*/ if ( $MATCH ) { log "No vacation message: $MATCH" exit }

/^(From|Return-Path):.*/ if ( $MATCH =~ /MAILER-DAEMON/ ) { log "No vacation message: $MATCH" exit }

/^X-Spam-Status:.*/ if ( $MATCH =~ /Yes/ ) { log "No vacation message: $MATCH" exit }

xfilter "reformail -r -t -I 'From: $LOGNAME' -I 'X-Loop: Vacation for
$LOGNAME' -I 'Reply-To: $LOGNAME' -I 'Auto-Submitted: auto-replied' -I
'Precedence: bulk'" /^To:.*/ getaddr($MATCH) =~ /^.*/;

MATCH=tolower($MATCH); flock "vacation.lock" { `fgrep -iqx "$MATCH" vacation.lst 2>/dev/null || { \ echo "$MATCH" >> vacation.lst ; \ exit 1; \ } ` } if ( $RETURNCODE == 0 ) { log "Already sent vacation message to $MATCH\n" exit } log "Vacation message to $MATCH:" to "| (cat - ; echo ''; cat vacation.msg) | $SENDMAIL -t" } else { log "Normal mail delivery for $LOGNAME:" to "$DEFAULT" }