#!/bin/bash
#
# Plugin to monitor incoming Postfix mail.
#
# Parameters understood:
#
# 	config   (required)
# 	autoconf (optional)
#

MAIL_LOG=${logfile:-/var/log/mail.log}
LOGTAIL=${logtail:-`which logtail`}
STATEFILE=/var/lib/munin/plugin-state/postfix_mailfiltered.offset

if [ "$1" = "autoconf" ]; then
        if [ -f "${MAIL_LOG}" -a -n "${LOGTAIL}" -a -x "${LOGTAIL}" ] ; then
		echo yes
		exit 0
	else
		echo no
		exit 1
	fi
fi

if [ "$1" = "config" ]; then
	echo 'graph_title Postfix daily filtering'
	echo 'graph_order relay rbl helo client sender recipient'
	echo 'graph_category mail'
	echo 'graph_vlabel Count'
	echo 'graph_args --base 1000 -l 0'
	echo 'graph_total total'

	echo 'relay.label Relay denied'
	echo 'relay.min 1'
	echo 'rbl.label RBL blocked'
	echo 'rbl.min 1'
	echo 'helo.label HELO rejected'
	echo 'helo.min 1'
	echo 'client.label Client rejected'
	echo 'client.min 1'
	echo 'sender.label Sender rejected'
	echo 'sender.min 1'
	echo 'recipient.label Recipient unknown'
	echo 'recipient.min 1'
        exit 0
fi


relay=u
rbl=U
helo=U
client=U
sender=U
recipient=U

TEMP_FILE=`mktemp -t munin-postfix_filtered.XXXXXX`

if [ -n "$TEMP_FILE" -a -f "$TEMP_FILE" ]
then
	$LOGTAIL ${MAIL_LOG} $STATEFILE | grep "postfix\/smtpd\[[0-9]*\]: NOQUEUE: reject:" > ${TEMP_FILE}

	relay=`grep 'Relay access denied' ${TEMP_FILE} | wc -l`
	rbl=`grep 'blocked using' ${TEMP_FILE} | wc -l`
	helo=`grep 'Helo command rejected' ${TEMP_FILE} | wc -l`
	client=`grep 'Client host rejected' ${TEMP_FILE} | wc -l`
        sender=`grep 'Sender address rejected' ${TEMP_FILE} | wc -l`
	recipient=`grep 'Recipient address rejected' ${TEMP_FILE} | grep -v "Greylisted" | wc -l`

	/bin/rm -f $TEMP_FILE
fi

echo "relay.value ${relay}"
echo "rbl.value ${rbl}"
echo "helo.value ${helo}"
echo "client.value ${client}"
echo "sender.value ${sender}"
echo "recipient.value ${recipient}"