#!/bin/sh
#
# per-domain.sh
#
# Example of applying different Anomy config files
# based on recipient domain.
#
# Looks in the $ANOMY directory for file named
# <recipient-domain>.conf. If it exists, Anomy is
# run using that config file instead of the default.
#
# Example: to filter mail addressed to 'example.com'
# using a different anomy config file, create a config 
# file named '/usr/local/anomy/example.com.conf'
#
# From http://advosys.ca/papers/postfix-filtering.html
# Advosys Consulting Inc., Ottawa
#
# For use with:
#    Postfix 20010228 or later
#    Anomy Sanitizer revision 1.49 or later
#    SpamAssassin 2.42 or later
#
# Note: Modify the file locations to match your particular 
#       server and installation of SpamAssassin.

# File locations: 
# (CHANGE AS REQUIRED TO MATCH YOUR SERVER)
INSPECT_DIR=/var/spool/filter
SENDMAIL="/usr/lib/sendmail -i"
ANOMY=/usr/local/anomy
SANITIZER=$ANOMY/bin/sanitizer.pl
SPAMASSASSIN=/usr/bin/spamassassin

# Location of default anomy config (to use when no domain matches):
ANOMY_CONF=$ANOMY/anomy.conf

# Optional file file for debugging:
ANOMY_LOG=/dev/null

export ANOMY

# Exit codes from <sysexits.h>
EX_TEMPFAIL=75
EX_UNAVAILABLE=69

cd $INSPECT_DIR || { echo $INSPECT_DIR does not exist; exit $EX_TEMPFAIL; }

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

# Extract domain from recipient parameter:
DOMAIN=`echo $4 | sed -e 's/^.*\@\(.*\)$/\1/g'`

# Redfine ANOMY_CONF variable if a domain-specific
# .conf file exists:
if [ -e $ANOMY/$DOMAIN.conf ]
then
	ANOMY_CONF=$ANOMY/$DOMAIN.conf
fi

cat | $SPAMASSASSIN -x | $SANITIZER \
   $ANOMY_CONF 2>>$ANOMY_LOG > out.$$ || \
   { echo Message content rejected; exit $EX_UNAVAILABLE; }

$SENDMAIL "$@" < out.$$

exit $?