#!/bin/sh

# -----------------------------------------------------------------
# File:        spamchk
#
# Author Mike O'Brien
#
# Report Bugs to mike@mobrien.com
#
# Purpose:     SPAMASSASIN shell-based filter
#
# Location:    /etc/postfix
#
# Usage:       Call this script from master.cf (Postfix)
#
# SpamAssassin Config  /etc/mail/spamassassin/local.cf
#
# Whitelist Config in  /etc/mail/spamassassin/local.cf 
#

# These are the Postfix master.cf entries
#smtp      inet  n       -       n       -       -       smtpd
#        -o content_filter=spamchk:dummy
#spamchk   unix  -       n       n       -       10      pipe
#  flags=Rq user=filter argv=/etc/postfix/spamchk -f ${sender} -- ${recipient}
# 
#
#
# Remember to run the following to build the seed bayesian dbs files
# sa-learn --spam /home/spamd
# sa-learn --ham /home/spamd
# -----------------------------------------------------------------

# Variables
SENDMAIL="/usr/local/sbin/sendmail -i"
EGREP=/usr/bin/egrep

# Exit codes from <sysexits.h>
EX_UNAVAILABLE=69

# Number of *'s in X-Spam-level header needed to sideline message:
# (Eg. Score of 5.5 = "*****" )
SPAMLIMIT=3

# Clean up when done or when aborting.
trap "rm -f /usr/tmp/out.$$" 0 1 2 3 15

# Pipe message to spamc
cat | /usr/local/bin/spamc -u filter > /usr/tmp/out.$$

# serious business
if $EGREP -q "^X-Spam-Level: \*\*\*" < /usr/tmp/out.$$
#if $EGREP -q "^X-Spam-Level: *{$SPAMLIMIT,}" < /usr/tmp/out.$$

then
   # $SENDMAIL jnk@yourdomain.com < /usr/tmp/out.$$
   rm -f /usr/tmp/out.$$

else

$SENDMAIL "$@"  < /usr/tmp/out.$$

fi

# Postfix returns the exit status of the Postfix sendmail command.
exit $?