#!/bin/sh

################################################################################
# PROXSMTP SAMPLE SCRIPT
#
# These sample scripts are to give you an idea of how to use proxsmtp 
# filtering. They are NOT intended for use on production servers.
# 
# A simple proxsmtp script which sends email through spamassassin.
# 
# Make sure the option 'FilterType' is set as follows:
#   FilterType: pipe
#
# See proxsmtpd.conf(5) for configuration details
#

# !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
#   WARNING WARNING WARNING WARNING WARNING WARNING WARNING 
#
#  By using variables passed in from clamsmtpd in file 
#  manipulation commands without escaping their contents 
#  you are opening yourself up to REMOTE COMPROMISE. You 
#  have been warned. Do NOT do the following unless you 
#  want to be screwed big time:
#
#  mv $EMAIL "$SENDER.eml"
#
#  An attacker can use the above command to compromise your
#  computer. The only variable that is guaranteed safe in
#  this regard is $EMAIL. 
# 
#  The following script does not escape its variables 
#  because it only uses them in safe ways. 
# 
# !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

# Pipe mail through this command 
spamassassin -e 

# Now check return value
if [ $? -ne 0 ]; then
	
	# The last line of output to stderr will be used
	# as an error message when the filter fails
	echo "550 Content Rejected: We don't like spam" >&2
	
	# Cause the filter to fail, email will be rejected
	exit 1
fi

# Filter success 
exit 0