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Monitoring Postfix and saving statistics with Zabbix on CentOS6

This post is about monitoring a postfix server with zabbix, and at the same time saving the postfix mail statistics to zabbix. I assume that you already have a zabbix server running either in another server, or in the same server as the mail server.

We will need pflogsumm and logtail utilities for parsing and analysing postfix mail log, and those utilities are not available in centos6 base repository. We will need to enable EPEL repository by downloading and installing the latest EPEL repository from here:

root@server:~# wget http://mirrors.ispros.com.bd/fedora-epel/6/i386/epel-release-6-8.noarch.rpm
root@server:~# rpm -Uvh epel-release-6-8.noarch.rpm

Now we will install pflogsumm and logtail:

root@server:~# yum install logcheck postfix-perl-scripts

Next, you will need to install zabbix and zabbix-agent on your mail server.

root@server:~# rpm -Uvh http://repo.zabbix.com/zabbix/2.2/rhel/6/x86_64/zabbix-2.2.3-1.el6.x86_64.rpm
root@server:~# rpm -Uvh http://repo.zabbix.com/zabbix/2.2/rhel/6/x86_64/zabbix-agent-2.2.3-1.el6.x86_64.rpm

Now edit /etc/zabbix/zabbix_agentd.conf and put the following content at the end:

EnableRemoteCommands=1
UserParameter=postfix.pfmailq,mailq | grep -v "Mail queue is empty" | grep -c '^[0-9A-Z]'
UserParameter=postfix[*],/usr/local/bin/postfix-zabbix-stats.bash $1
Server=192.168.40.50

192.168.40.50 is your zabbix server IP, adjust it according to your actual zabbix server IP

Now put the following content in /usr/local/bin/postfix-zabbix-stats.bash and make it executable with chmod +x /usr/local/bin/postfix-zabbix-stats.bash:

#!/bin/bash

MAILLOG=/var/log/maillog
PFOFFSETFILE=/tmp/zabbix-postfix-offset.dat
PFSTATSFILE=/tmp/postfix_statsfile.dat
TEMPFILE=$(mktemp)
PFLOGSUMM=/usr/sbin/pflogsumm
LOGTAIL=/usr/sbin/logtail

PFVALS=( 'received' 'delivered' 'forwarded' 'deferred' 'bounced' 'rejected' 'held' 'discarded' 'reject_warnings' 'bytes_received' 'bytes_delivered' )

[ ! -e "${PFSTATSFILE}" ] && touch "${PFSTATSFILE}" && chown zabbix:zabbix "${PFSTATSFILE}"

printvalues() {
  key=$1
  pfkey=$(echo "$1" | tr '_' ' ')
  value=$(grep -m 1 "${pfkey}" $TEMPFILE | awk '{print $1}' | awk '/k|m/{p = /k/?1:2}{printf "%d\n", int($1) * 1024 ^ p}')
  old_value=$(grep -e "^${key};" "${PFSTATSFILE}" | cut -d ";" -f2)
  if [ -n "${old_value}" ]; then
    sed -i -e "s/^${key};${old_value}/${key};$((${old_value}+${value}))/" "${PFSTATSFILE}"
#   sed -i -e "s/^${key};${old_value}/${key};$(((${old_value})+(${value})))/" "${PFSTATSFILE}"

  else
    echo "${key};${value}" >> "${PFSTATSFILE}"
  fi
}

if [ -n "$1" ]; then 
  key=$(echo ${PFVALS[@]} | grep -wo $1)
  if [ -n "${key}" ]; then
    value=$(grep -e "^${key};" "${PFSTATSFILE}" | cut -d ";" -f2)
    echo "${value}"
  else
    rm "${TEMPFILE}"
    exit 2
  fi
else
   "${LOGTAIL}" -f"${MAILLOG}" -o"${PFOFFSETFILE}" | "${PFLOGSUMM}" -h 0 -u 0 --no_bounce_detail --no_deferral_detail --no_reject_detail --no_no_msg_size --no_smtpd_warnings > "${TEMPFILE}"
   for i in "${PFVALS[@]}"; do
      printvalues "$i"
   done
fi

rm "${TEMPFILE}"

Make a cronjob:

*/10 * * * * /usr/local/bin/postfix-zabbix-stats.bash

Import the following template in your "zabbix server". It will show up in the list of templates as "Template App Postfix". Add your postfix server as a monitored host in zabbix server, then associate the template with that host:

<?xml version="1.0" encoding="UTF-8"?>
<zabbix_export>
    <version>2.0</version>
    <date>2014-02-03T14:56:13Z</date>
    <groups>
        <group>
            <name>Templates</name>
        </group>
    </groups>
    <templates>
        <template>
            <template>Template App Postfix</template>
            <name>Template App Postfix</name>
            <groups>
                <group>
                    <name>Templates</name>
                </group>
            </groups>
            <applications>
                <application>
                    <name>Postfix</name>
                </application>
            </applications>
            <items>
                <item>
                    <name>Postfix Bounced</name>
                    <type>0</type>
                    <snmp_community/>
                    <multiplier>0</multiplier>
                    <snmp_oid/>
                    <key>postfix[bounced]</key>
                    <delay>600</delay>
                    <history>30</history>
                    <trends>365</trends>
                    <status>0</status>
                    <value_type>3</value_type>
                    <allowed_hosts/>
                    <units>mails</units>
                    <delta>2</delta>
                    <snmpv3_contextname/>
                    <snmpv3_securityname/>
                    <snmpv3_securitylevel>0</snmpv3_securitylevel>
                    <snmpv3_authprotocol>0</snmpv3_authprotocol>
                    <snmpv3_authpassphrase/>
                    <snmpv3_privprotocol>0</snmpv3_privprotocol>
                    <snmpv3_privpassphrase/>
                    <formula>1</formula>
                    <delay_flex/>
                    <params/>
                    <ipmi_sensor/>
                    <data_type>0</data_type>
                    <authtype>0</authtype>
                    <username/>
                    <password/>
                    <publickey/>
                    <privatekey/>
                    <port/>
                    <description/>
                    <inventory_link>0</inventory_link>
                    <applications>
                        <application>
                            <name>Postfix</name>
                        </application>
                    </applications>
                    <valuemap/>
                </item>
                <item>
                    <name>Postfix Bytes Delivered</name>
                    <type>0</type>
                    <snmp_community/>
                    <multiplier>0</multiplier>
                    <snmp_oid/>
                    <key>postfix[bytes_delivered]</key>
                    <delay>600</delay>
                    <history>30</history>
                    <trends>365</trends>
                    <status>0</status>
                    <value_type>3</value_type>
                    <allowed_hosts/>
                    <units>B</units>
                    <delta>2</delta>
                    <snmpv3_contextname/>
                    <snmpv3_securityname/>
                    <snmpv3_securitylevel>0</snmpv3_securitylevel>
                    <snmpv3_authprotocol>0</snmpv3_authprotocol>
                    <snmpv3_authpassphrase/>
                    <snmpv3_privprotocol>0</snmpv3_privprotocol>
                    <snmpv3_privpassphrase/>
                    <formula>1</formula>
                    <delay_flex/>
                    <params/>
                    <ipmi_sensor/>
                    <data_type>0</data_type>
                    <authtype>0</authtype>
                    <username/>
                    <password/>
                    <publickey/>
                    <privatekey/>
                    <port/>
                    <description/>
                    <inventory_link>0</inventory_link>
                    <applications>
                        <application>
                            <name>Postfix</name>
                        </application>
                    </applications>
                    <valuemap/>
                </item>
                <item>
                    <name>Postfix Bytes Received</name>
                    <type>0</type>
                    <snmp_community/>
                    <multiplier>0</multiplier>
                    <snmp_oid/>
                    <key>postfix[bytes_received]</key>
                    <delay>600</delay>
                    <history>30</history>
                    <trends>365</trends>
                    <status>0</status>
                    <value_type>3</value_type>
                    <allowed_hosts/>
                    <units>B</units>
                    <delta>2</delta>
                    <snmpv3_contextname/>
                    <snmpv3_securityname/>
                    <snmpv3_securitylevel>0</snmpv3_securitylevel>
                    <snmpv3_authprotocol>0</snmpv3_authprotocol>
                    <snmpv3_authpassphrase/>
                    <snmpv3_privprotocol>0</snmpv3_privprotocol>
                    <snmpv3_privpassphrase/>
                    <formula>1</formula>
                    <delay_flex/>
                    <params/>
                    <ipmi_sensor/>
                    <data_type>0</data_type>
                    <authtype>0</authtype>
                    <username/>
                    <password/>
                    <publickey/>
                    <privatekey/>
                    <port/>
                    <description/>
                    <inventory_link>0</inventory_link>
                    <applications>
                        <application>
                            <name>Postfix</name>
                        </application>
                    </applications>
                    <valuemap/>
                </item>
                <item>
                    <name>Postfix Deferred</name>
                    <type>0</type>
                    <snmp_community/>
                    <multiplier>0</multiplier>
                    <snmp_oid/>
                    <key>postfix[deferred]</key>
                    <delay>600</delay>
                    <history>30</history>
                    <trends>365</trends>
                    <status>0</status>
                    <value_type>3</value_type>
                    <allowed_hosts/>
                    <units>mails</units>
                    <delta>2</delta>
                    <snmpv3_contextname/>
                    <snmpv3_securityname/>
                    <snmpv3_securitylevel>0</snmpv3_securitylevel>
                    <snmpv3_authprotocol>0</snmpv3_authprotocol>
                    <snmpv3_authpassphrase/>
                    <snmpv3_privprotocol>0</snmpv3_privprotocol>
                    <snmpv3_privpassphrase/>
                    <formula>1</formula>
                    <delay_flex/>
                    <params/>
                    <ipmi_sensor/>
                    <data_type>0</data_type>
                    <authtype>0</authtype>
                    <username/>
                    <password/>
                    <publickey/>
                    <privatekey/>
                    <port/>
                    <description/>
                    <inventory_link>0</inventory_link>
                    <applications>
                        <application>
                            <name>Postfix</name>
                        </application>
                    </applications>
                    <valuemap/>
                </item>
                <item>
                    <name>Postfix Delivered</name>
                    <type>0</type>
                    <snmp_community/>
                    <multiplier>0</multiplier>
                    <snmp_oid/>
                    <key>postfix[delivered]</key>
                    <delay>600</delay>
                    <history>30</history>
                    <trends>365</trends>
                    <status>0</status>
                    <value_type>3</value_type>
                    <allowed_hosts/>
                    <units>mails</units>
                    <delta>2</delta>
                    <snmpv3_contextname/>
                    <snmpv3_securityname/>
                    <snmpv3_securitylevel>0</snmpv3_securitylevel>
                    <snmpv3_authprotocol>0</snmpv3_authprotocol>
                    <snmpv3_authpassphrase/>
                    <snmpv3_privprotocol>0</snmpv3_privprotocol>
                    <snmpv3_privpassphrase/>
                    <formula>1</formula>
                    <delay_flex/>
                    <params/>
                    <ipmi_sensor/>
                    <data_type>0</data_type>
                    <authtype>0</authtype>
                    <username/>
                    <password/>
                    <publickey/>
                    <privatekey/>
                    <port/>
                    <description/>
                    <inventory_link>0</inventory_link>
                    <applications>
                        <application>
                            <name>Postfix</name>
                        </application>
                    </applications>
                    <valuemap/>
                </item>
                <item>
                    <name>Postfix Discarded</name>
                    <type>0</type>
                    <snmp_community/>
                    <multiplier>0</multiplier>
                    <snmp_oid/>
                    <key>postfix[discarded]</key>
                    <delay>600</delay>
                    <history>30</history>
                    <trends>365</trends>
                    <status>0</status>
                    <value_type>3</value_type>
                    <allowed_hosts/>
                    <units>mails</units>
                    <delta>2</delta>
                    <snmpv3_contextname/>
                    <snmpv3_securityname/>
                    <snmpv3_securitylevel>0</snmpv3_securitylevel>
                    <snmpv3_authprotocol>0</snmpv3_authprotocol>
                    <snmpv3_authpassphrase/>
                    <snmpv3_privprotocol>0</snmpv3_privprotocol>
                    <snmpv3_privpassphrase/>
                    <formula>1</formula>
                    <delay_flex/>
                    <params/>
                    <ipmi_sensor/>
                    <data_type>0</data_type>
                    <authtype>0</authtype>
                    <username/>
                    <password/>
                    <publickey/>
                    <privatekey/>
                    <port/>
                    <description/>
                    <inventory_link>0</inventory_link>
                    <applications>
                        <application>
                            <name>Postfix</name>
                        </application>
                    </applications>
                    <valuemap/>
                </item>
                <item>
                    <name>Postfix Forwarded</name>
                    <type>0</type>
                    <snmp_community/>
                    <multiplier>0</multiplier>
                    <snmp_oid/>
                    <key>postfix[forwarded]</key>
                    <delay>600</delay>
                    <history>30</history>
                    <trends>365</trends>
                    <status>0</status>
                    <value_type>3</value_type>
                    <allowed_hosts/>
                    <units>mails</units>
                    <delta>2</delta>
                    <snmpv3_contextname/>
                    <snmpv3_securityname/>
                    <snmpv3_securitylevel>0</snmpv3_securitylevel>
                    <snmpv3_authprotocol>0</snmpv3_authprotocol>
                    <snmpv3_authpassphrase/>
                    <snmpv3_privprotocol>0</snmpv3_privprotocol>
                    <snmpv3_privpassphrase/>
                    <formula>1</formula>
                    <delay_flex/>
                    <params/>
                    <ipmi_sensor/>
                    <data_type>0</data_type>
                    <authtype>0</authtype>
                    <username/>
                    <password/>
                    <publickey/>
                    <privatekey/>
                    <port/>
                    <description/>
                    <inventory_link>0</inventory_link>
                    <applications>
                        <application>
                            <name>Postfix</name>
                        </application>
                    </applications>
                    <valuemap/>
                </item>
                <item>
                    <name>Postfix Held</name>
                    <type>0</type>
                    <snmp_community/>
                    <multiplier>0</multiplier>
                    <snmp_oid/>
                    <key>postfix[held]</key>
                    <delay>600</delay>
                    <history>30</history>
                    <trends>365</trends>
                    <status>0</status>
                    <value_type>3</value_type>
                    <allowed_hosts/>
                    <units>mails</units>
                    <delta>2</delta>
                    <snmpv3_contextname/>
                    <snmpv3_securityname/>
                    <snmpv3_securitylevel>0</snmpv3_securitylevel>
                    <snmpv3_authprotocol>0</snmpv3_authprotocol>
                    <snmpv3_authpassphrase/>
                    <snmpv3_privprotocol>0</snmpv3_privprotocol>
                    <snmpv3_privpassphrase/>
                    <formula>1</formula>
                    <delay_flex/>
                    <params/>
                    <ipmi_sensor/>
                    <data_type>0</data_type>
                    <authtype>0</authtype>
                    <username/>
                    <password/>
                    <publickey/>
                    <privatekey/>
                    <port/>
                    <description/>
                    <inventory_link>0</inventory_link>
                    <applications>
                        <application>
                            <name>Postfix</name>
                        </application>
                    </applications>
                    <valuemap/>
                </item>
                <item>
                    <name>Postfix Mail Queue</name>
                    <type>0</type>
                    <snmp_community/>
                    <multiplier>0</multiplier>
                    <snmp_oid/>
                    <key>postfix.pfmailq</key>
                    <delay>300</delay>
                    <history>30</history>
                    <trends>365</trends>
                    <status>0</status>
                    <value_type>3</value_type>
                    <allowed_hosts/>
                    <units>mails</units>
                    <delta>2</delta>
                    <snmpv3_contextname/>
                    <snmpv3_securityname/>
                    <snmpv3_securitylevel>0</snmpv3_securitylevel>
                    <snmpv3_authprotocol>0</snmpv3_authprotocol>
                    <snmpv3_authpassphrase/>
                    <snmpv3_privprotocol>0</snmpv3_privprotocol>
                    <snmpv3_privpassphrase/>
                    <formula>1</formula>
                    <delay_flex/>
                    <params/>
                    <ipmi_sensor/>
                    <data_type>0</data_type>
                    <authtype>0</authtype>
                    <username/>
                    <password/>
                    <publickey/>
                    <privatekey/>
                    <port/>
                    <description/>
                    <inventory_link>0</inventory_link>
                    <applications>
                        <application>
                            <name>Postfix</name>
                        </application>
                    </applications>
                    <valuemap/>
                </item>
                <item>
                    <name>Postfix Received</name>
                    <type>0</type>
                    <snmp_community/>
                    <multiplier>0</multiplier>
                    <snmp_oid/>
                    <key>postfix[received]</key>
                    <delay>600</delay>
                    <history>30</history>
                    <trends>365</trends>
                    <status>0</status>
                    <value_type>3</value_type>
                    <allowed_hosts/>
                    <units>mails</units>
                    <delta>2</delta>
                    <snmpv3_contextname/>
                    <snmpv3_securityname/>
                    <snmpv3_securitylevel>0</snmpv3_securitylevel>
                    <snmpv3_authprotocol>0</snmpv3_authprotocol>
                    <snmpv3_authpassphrase/>
                    <snmpv3_privprotocol>0</snmpv3_privprotocol>
                    <snmpv3_privpassphrase/>
                    <formula>1</formula>
                    <delay_flex/>
                    <params/>
                    <ipmi_sensor/>
                    <data_type>0</data_type>
                    <authtype>0</authtype>
                    <username/>
                    <password/>
                    <publickey/>
                    <privatekey/>
                    <port/>
                    <description/>
                    <inventory_link>0</inventory_link>
                    <applications>
                        <application>
                            <name>Postfix</name>
                        </application>
                    </applications>
                    <valuemap/>
                </item>
                <item>
                    <name>Postfix Rejected</name>
                    <type>0</type>
                    <snmp_community/>
                    <multiplier>0</multiplier>
                    <snmp_oid/>
                    <key>postfix[rejected]</key>
                    <delay>600</delay>
                    <history>30</history>
                    <trends>365</trends>
                    <status>0</status>
                    <value_type>3</value_type>
                    <allowed_hosts/>
                    <units>mails</units>
                    <delta>2</delta>
                    <snmpv3_contextname/>
                    <snmpv3_securityname/>
                    <snmpv3_securitylevel>0</snmpv3_securitylevel>
                    <snmpv3_authprotocol>0</snmpv3_authprotocol>
                    <snmpv3_authpassphrase/>
                    <snmpv3_privprotocol>0</snmpv3_privprotocol>
                    <snmpv3_privpassphrase/>
                    <formula>1</formula>
                    <delay_flex/>
                    <params/>
                    <ipmi_sensor/>
                    <data_type>0</data_type>
                    <authtype>0</authtype>
                    <username/>
                    <password/>
                    <publickey/>
                    <privatekey/>
                    <port/>
                    <description/>
                    <inventory_link>0</inventory_link>
                    <applications>
                        <application>
                            <name>Postfix</name>
                        </application>
                    </applications>
                    <valuemap/>
                </item>
                <item>
                    <name>Postfix Reject Warnings</name>
                    <type>0</type>
                    <snmp_community/>
                    <multiplier>0</multiplier>
                    <snmp_oid/>
                    <key>postfix[reject_warnings]</key>
                    <delay>600</delay>
                    <history>30</history>
                    <trends>365</trends>
                    <status>0</status>
                    <value_type>3</value_type>
                    <allowed_hosts/>
                    <units>mails</units>
                    <delta>2</delta>
                    <snmpv3_contextname/>
                    <snmpv3_securityname/>
                    <snmpv3_securitylevel>0</snmpv3_securitylevel>
                    <snmpv3_authprotocol>0</snmpv3_authprotocol>
                    <snmpv3_authpassphrase/>
                    <snmpv3_privprotocol>0</snmpv3_privprotocol>
                    <snmpv3_privpassphrase/>
                    <formula>1</formula>
                    <delay_flex/>
                    <params/>
                    <ipmi_sensor/>
                    <data_type>0</data_type>
                    <authtype>0</authtype>
                    <username/>
                    <password/>
                    <publickey/>
                    <privatekey/>
                    <port/>
                    <description/>
                    <inventory_link>0</inventory_link>
                    <applications>
                        <application>
                            <name>Postfix</name>
                        </application>
                    </applications>
                    <valuemap/>
                </item>
            </items>
            <discovery_rules/>
            <macros/>
            <templates>
                <template>
                    <name>Template SMTP Server</name>
                </template>
            </templates>
            <screens/>
        </template>
        <template>
            <template>Template SMTP Server</template>
            <name>Template SMTP Server</name>
            <groups>
                <group>
                    <name>Templates</name>
                </group>
            </groups>
            <applications/>
            <items>
                <item>
                    <name>Port 25/SMTP is running</name>
                    <type>3</type>
                    <snmp_community/>
                    <multiplier>0</multiplier>
                    <snmp_oid/>
                    <key>net.tcp.service[smtp]</key>
                    <delay>60</delay>
                    <history>90</history>
                    <trends>365</trends>
                    <status>0</status>
                    <value_type>3</value_type>
                    <allowed_hosts/>
                    <units/>
                    <delta>0</delta>
                    <snmpv3_contextname/>
                    <snmpv3_securityname/>
                    <snmpv3_securitylevel>0</snmpv3_securitylevel>
                    <snmpv3_authprotocol>0</snmpv3_authprotocol>
                    <snmpv3_authpassphrase/>
                    <snmpv3_privprotocol>0</snmpv3_privprotocol>
                    <snmpv3_privpassphrase/>
                    <formula>1</formula>
                    <delay_flex/>
                    <params/>
                    <ipmi_sensor/>
                    <data_type>0</data_type>
                    <authtype>0</authtype>
                    <username/>
                    <password/>
                    <publickey/>
                    <privatekey/>
                    <port/>
                    <description/>
                    <inventory_link>0</inventory_link>
                    <applications/>
                    <valuemap/>
                </item>
            </items>
            <discovery_rules/>
            <macros/>
            <templates/>
            <screens/>
        </template>
    </templates>
    <triggers>
        <trigger>
            <expression>{Template App Postfix:postfix[bounced].last(0)}>50</expression>
            <name>Postfix: Too many bounced mails on {HOST.NAME}</name>
            <url/>
            <status>0</status>
            <priority>2</priority>
            <description/>
            <type>0</type>
            <dependencies/>
        </trigger>
        <trigger>
            <expression>{Template App Postfix:postfix[deferred].last(0)}>50</expression>
            <name>Postfix: Too many deferred mails on {HOST.NAME}</name>
            <url/>
            <status>0</status>
            <priority>4</priority>
            <description/>
            <type>0</type>
            <dependencies/>
        </trigger>
        <trigger>
            <expression>{Template App Postfix:postfix[held].last(0)}>200 | {Template App Postfix:postfix.pfmailq.last(0)}>200</expression>
            <name>Postfix: Too many held mails on {HOST.NAME}</name>
            <url/>
            <status>0</status>
            <priority>2</priority>
            <description/>
            <type>0</type>
            <dependencies/>
        </trigger>
        <trigger>
            <expression>{Template App Postfix:postfix[rejected].last(0)}>20 | {Template App Postfix:postfix[reject_warnings].last(0)}>20</expression>
            <name>Postfix: Too many rejected mails on {HOST.NAME}</name>
            <url/>
            <status>0</status>
            <priority>4</priority>
            <description/>
            <type>0</type>
            <dependencies/>
        </trigger>
        <trigger>
            <expression>{Template SMTP Server:net.tcp.service[smtp].last(0)}#1</expression>
            <name>SMTP Service is down on {HOST.NAME}</name>
            <url/>
            <status>0</status>
            <priority>4</priority>
            <description/>
            <type>0</type>
            <dependencies/>
        </trigger>
    </triggers>
    <graphs>
        <graph>
            <name>Postfix Error Pie</name>
            <width>900</width>
            <height>200</height>
            <yaxismin>0.0000</yaxismin>
            <yaxismax>0.0000</yaxismax>
            <show_work_period>0</show_work_period>
            <show_triggers>0</show_triggers>
            <type>3</type>
            <show_legend>1</show_legend>
            <show_3d>1</show_3d>
            <percent_left>0.0000</percent_left>
            <percent_right>0.0000</percent_right>
            <ymin_type_1>0</ymin_type_1>
            <ymax_type_1>0</ymax_type_1>
            <ymin_item_1>0</ymin_item_1>
            <ymax_item_1>0</ymax_item_1>
            <graph_items>
                <graph_item>
                    <sortorder>0</sortorder>
                    <drawtype>0</drawtype>
                    <color>C80000</color>
                    <yaxisside>0</yaxisside>
                    <calc_fnc>2</calc_fnc>
                    <type>0</type>
                    <item>
                        <host>Template App Postfix</host>
                        <key>postfix[bounced]</key>
                    </item>
                </graph_item>
                <graph_item>
                    <sortorder>1</sortorder>
                    <drawtype>0</drawtype>
                    <color>00C800</color>
                    <yaxisside>0</yaxisside>
                    <calc_fnc>2</calc_fnc>
                    <type>0</type>
                    <item>
                        <host>Template App Postfix</host>
                        <key>postfix[deferred]</key>
                    </item>
                </graph_item>
                <graph_item>
                    <sortorder>2</sortorder>
                    <drawtype>0</drawtype>
                    <color>0000C8</color>
                    <yaxisside>0</yaxisside>
                    <calc_fnc>2</calc_fnc>
                    <type>0</type>
                    <item>
                        <host>Template App Postfix</host>
                        <key>postfix[discarded]</key>
                    </item>
                </graph_item>
                <graph_item>
                    <sortorder>3</sortorder>
                    <drawtype>0</drawtype>
                    <color>C800C8</color>
                    <yaxisside>0</yaxisside>
                    <calc_fnc>2</calc_fnc>
                    <type>0</type>
                    <item>
                        <host>Template App Postfix</host>
                        <key>postfix[rejected]</key>
                    </item>
                </graph_item>
                <graph_item>
                    <sortorder>4</sortorder>
                    <drawtype>0</drawtype>
                    <color>00C8C8</color>
                    <yaxisside>0</yaxisside>
                    <calc_fnc>2</calc_fnc>
                    <type>0</type>
                    <item>
                        <host>Template App Postfix</host>
                        <key>postfix[reject_warnings]</key>
                    </item>
                </graph_item>
            </graph_items>
        </graph>
        <graph>
            <name>Postfix Mails Scoreboard</name>
            <width>900</width>
            <height>300</height>
            <yaxismin>0.0000</yaxismin>
            <yaxismax>100.0000</yaxismax>
            <show_work_period>0</show_work_period>
            <show_triggers>0</show_triggers>
            <type>0</type>
            <show_legend>1</show_legend>
            <show_3d>0</show_3d>
            <percent_left>0.0000</percent_left>
            <percent_right>0.0000</percent_right>
            <ymin_type_1>0</ymin_type_1>
            <ymax_type_1>0</ymax_type_1>
            <ymin_item_1>0</ymin_item_1>
            <ymax_item_1>0</ymax_item_1>
            <graph_items>
                <graph_item>
                    <sortorder>0</sortorder>
                    <drawtype>0</drawtype>
                    <color>009900</color>
                    <yaxisside>0</yaxisside>
                    <calc_fnc>2</calc_fnc>
                    <type>0</type>
                    <item>
                        <host>Template App Postfix</host>
                        <key>postfix[bounced]</key>
                    </item>
                </graph_item>
                <graph_item>
                    <sortorder>1</sortorder>
                    <drawtype>0</drawtype>
                    <color>FF99FF</color>
                    <yaxisside>0</yaxisside>
                    <calc_fnc>2</calc_fnc>
                    <type>0</type>
                    <item>
                        <host>Template App Postfix</host>
                        <key>postfix[reject_warnings]</key>
                    </item>
                </graph_item>
                <graph_item>
                    <sortorder>2</sortorder>
                    <drawtype>0</drawtype>
                    <color>AAAA00</color>
                    <yaxisside>0</yaxisside>
                    <calc_fnc>2</calc_fnc>
                    <type>0</type>
                    <item>
                        <host>Template App Postfix</host>
                        <key>postfix.pfmailq</key>
                    </item>
                </graph_item>
                <graph_item>
                    <sortorder>3</sortorder>
                    <drawtype>0</drawtype>
                    <color>EE00EE</color>
                    <yaxisside>0</yaxisside>
                    <calc_fnc>2</calc_fnc>
                    <type>0</type>
                    <item>
                        <host>Template App Postfix</host>
                        <key>postfix[discarded]</key>
                    </item>
                </graph_item>
                <graph_item>
                    <sortorder>4</sortorder>
                    <drawtype>0</drawtype>
                    <color>880088</color>
                    <yaxisside>0</yaxisside>
                    <calc_fnc>2</calc_fnc>
                    <type>0</type>
                    <item>
                        <host>Template App Postfix</host>
                        <key>postfix[rejected]</key>
                    </item>
                </graph_item>
                <graph_item>
                    <sortorder>5</sortorder>
                    <drawtype>0</drawtype>
                    <color>0000CC</color>
                    <yaxisside>0</yaxisside>
                    <calc_fnc>2</calc_fnc>
                    <type>0</type>
                    <item>
                        <host>Template App Postfix</host>
                        <key>postfix[received]</key>
                    </item>
                </graph_item>
                <graph_item>
                    <sortorder>6</sortorder>
                    <drawtype>0</drawtype>
                    <color>FF6666</color>
                    <yaxisside>0</yaxisside>
                    <calc_fnc>2</calc_fnc>
                    <type>0</type>
                    <item>
                        <host>Template App Postfix</host>
                        <key>postfix[held]</key>
                    </item>
                </graph_item>
                <graph_item>
                    <sortorder>7</sortorder>
                    <drawtype>0</drawtype>
                    <color>FFFF33</color>
                    <yaxisside>0</yaxisside>
                    <calc_fnc>2</calc_fnc>
                    <type>0</type>
                    <item>
                        <host>Template App Postfix</host>
                        <key>postfix[forwarded]</key>
                    </item>
                </graph_item>
                <graph_item>
                    <sortorder>8</sortorder>
                    <drawtype>0</drawtype>
                    <color>00EE00</color>
                    <yaxisside>0</yaxisside>
                    <calc_fnc>2</calc_fnc>
                    <type>0</type>
                    <item>
                        <host>Template App Postfix</host>
                        <key>postfix[delivered]</key>
                    </item>
                </graph_item>
                <graph_item>
                    <sortorder>9</sortorder>
                    <drawtype>0</drawtype>
                    <color>EE0000</color>
                    <yaxisside>0</yaxisside>
                    <calc_fnc>2</calc_fnc>
                    <type>0</type>
                    <item>
                        <host>Template App Postfix</host>
                        <key>postfix[deferred]</key>
                    </item>
                </graph_item>
            </graph_items>
        </graph>
        <graph>
            <name>Postfix Traffic</name>
            <width>900</width>
            <height>200</height>
            <yaxismin>0.0000</yaxismin>
            <yaxismax>100.0000</yaxismax>
            <show_work_period>0</show_work_period>
            <show_triggers>0</show_triggers>
            <type>0</type>
            <show_legend>1</show_legend>
            <show_3d>0</show_3d>
            <percent_left>0.0000</percent_left>
            <percent_right>0.0000</percent_right>
            <ymin_type_1>0</ymin_type_1>
            <ymax_type_1>0</ymax_type_1>
            <ymin_item_1>0</ymin_item_1>
            <ymax_item_1>0</ymax_item_1>
            <graph_items>
                <graph_item>
                    <sortorder>0</sortorder>
                    <drawtype>0</drawtype>
                    <color>C80000</color>
                    <yaxisside>0</yaxisside>
                    <calc_fnc>2</calc_fnc>
                    <type>0</type>
                    <item>
                        <host>Template App Postfix</host>
                        <key>postfix[bytes_received]</key>
                    </item>
                </graph_item>
                <graph_item>
                    <sortorder>1</sortorder>
                    <drawtype>0</drawtype>
                    <color>00C800</color>
                    <yaxisside>0</yaxisside>
                    <calc_fnc>2</calc_fnc>
                    <type>0</type>
                    <item>
                        <host>Template App Postfix</host>
                        <key>postfix[bytes_delivered]</key>
                    </item>
                </graph_item>
            </graph_items>
        </graph>
    </graphs>
</zabbix_export>

Your zabbix server should now have the statistics from your mail server, as well as triggers for unreachable mail server etc.

Software Solutions