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--- internet:mail:postfix_queue_mgmt [2014/01/09 11:03]
gcooper
+++ internet:mail:postfix_queue_mgmt [2018/11/02 07:11] (current)
gcooper
@@ Line 58: / Line 58: @@
 ==== Purge Mail Queues ====
-Delete all queued mail:
+To delete all email in the queue from a domain run this command as root:
+postqueue -p | tail -n +2 | awk 'BEGIN { RS = "" } /@example\.com/ { print $1 }' | tr -d '*!' | postsuper -d -
+To delete all email in the queue From: a specific email address run this command as root:
+postqueue -p | tail -n +2 | awk 'BEGIN { RS = "" } /username@example\.com/ { print $1 }' | tr -d '*!' | postsuper -d -
+To delete all queued mail:
 <file>
@@ Line 109: / Line 117: @@
 </file>
-Delete all queued messages that contain the word "xyz" in the e-mail address:
+Delete all queued messages that contain the word ''xyz'' in the e-mail address:
 <file>
 ./postfix-delete.pl xyz
 </file>
+===== Monitoring Postfix Queues =====
+http://stackoverflow.com/questions/226699/how-to-monitor-postfix-mta-status
+This script monitors queues and sends an alert via another mail server.
+<file>
+#!/bin/bash
+#
+# Postfix queue length monitoring script (requires msmtp)
+#
+# This script checks the active, incoming, deferred and maildrop postfix queue directories.
+#
+# If the number of messages in any of these directories is more than $MAX_QUEUE_LENGTH,
+# the script will generate an alert email and send it using msmtp. We use msmtp so that
+# we can bypass the local postfix installation (since if the queues are getting big,
+# the alert email may not be sent in time to catch the problem).
+#
+#########################################################
+# SET SCRIPT VARS
+#########################################################
+# Path to msmtp binary (e.g. /usr/bin/msmtp on Debian systems)
+MSMTP=/usr/bin/msmtp
+# Remote mail host (this is the mail server msmtp will use to send the alert. It should NOT be the local postfix installation)
+MAILHOST=backup.mailserver.com
+# Remote mail port
+MAILPORT=25
+# Mail protocol
+MAILPROTO=smtp
+# Fully qualified domain name of local postfix installation
+DOMAIN=primary.mailserver.com
+# From address
+MAILFROM=postmaster@mailserver.com
+# Recipient (this address should not route to the local postfix installation, for obvious reasons)
+MAILTO="alerts@anotherdomain.com"
+# Email subject
+MAILSUBJECT="Postfix queue length alert for ${DOMAIN}"
+# MSMTP log file
+LOGFILE=/var/log/msmtp.log
+# Root of the postfix queue dirs (e.g. /var/spool/postfix on Debian systems). Note: no trailing slash.
+QUEUEDIR_ROOT="/var/spool/postfix"
+# Max queue length (if there are more messages in a queue than this number, we will send an alert)
+MAX_QUEUE_LENGTH=10
+#########################################################
+# SCRIPT LOGIC STARTS HERE
+#########################################################
+# Check msmtp binary exists
+if [ ! -f ${MSMTP} ]
+then
+        echo "Cannot find ${MSMTP}. Exiting."
+        exit 1
+fi
+# Get the number of messages sitting in each postfix queue directory
+Q_ACTIVE=$(find ${QUEUEDIR_ROOT}/active -type f | wc -l)
+Q_INCOMING=$(find ${QUEUEDIR_ROOT}/incoming -type f | wc -l)
+Q_DEFERRED=$(find ${QUEUEDIR_ROOT}/deferred -type f | wc -l)
+Q_MAILDROP=$(find ${QUEUEDIR_ROOT}/maildrop -type f | wc -l)
+# If any of these queues contain more than $MAX_QUEUE_LENGTH issue an alert
+if [ ${Q_ACTIVE} -gt ${MAX_QUEUE_LENGTH} -o ${Q_INCOMING} -gt ${MAX_QUEUE_LENGTH} -o ${Q_DEFERRED} -gt ${MAX_QUEUE_LENGTH} -o ${Q_MAILDROP} -gt ${MAX_QUEUE_LENGTH} ]; then
+    (
+        echo "From: ${MAILFROM} "
+        echo "To: ${MAILTO} "
+        echo "Mime-Version: 1.0"
+        echo 'Content-Type: text/plain; charset="iso-8859-1"'
+        echo "Subject: ${MAILSUBJECT}"
+        echo ""
+        echo "One or more of the postfix queues on ${DOMAIN} has grown beyond ${MAX_QUEUE_LENGTH} messages in length."
+    ) | ${MSMTP} --host=${MAILHOST} --port=${MAILPORT} --protocol=${MAILPROTO} --domain=${DOMAIN} --auth=off --tls=off --from=${MAILFROM} --logfile=${LOGFILE} --syslog=off --read-recipients
+    exit 2
+fi
+exit 0
+</file>
+==== Via SNMP ====
+http://exchange.nagios.org/directory/Plugins/Email-and-Groupware/Postfix/Postfix-Queue-Monitor/details
+http://www.paessler.com/knowledgebase/en/topic/21223-monitoring-e-mail-queue-on-postfix

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