Purge in mailq with sender MAILER-DEAMON and from address X

purge-mailer-daemon.sh

#!/bin/bash
# Author: Matthias Glastra
# Purpose: Purge e-mail that are beeing send by the MAILER-DAEMON based on a from address.
# Usage:
# ./purge-mailer-daemon.sh "example.com"
#
# Example:
#  When a spam attack happend by example.com and e-mails could not be delivered the daemon starts
#  sending e-mails back. You can remove these e-mail through this script.
#

MAILQ_MAILER_DAEMON=`mailq | awk ' /^[0-9A-F][0-9A-F]*.*MAILER-DAEMON$/ {print $1}'`
MAILQ_COUNT=`echo "$MAILQ_MAILER_DAEMON" | wc -l`

echo "MAILER-DAEMON count: $MAILQ_COUNT"
MAILQ_FROM=$1

while read -r MAILQ_ID
do
  MAIL=`postcat -q $MAILQ_ID`

  # If we want to purge the MAILER-DAEMON list based on a From address proceed.
  if [ -n "$MAILQ_FROM" ]
  then

    MATCH_FROM=`echo "$MAIL" | grep "From:.*$MAILQ_FROM.*"`
    if [ -n "$MATCH_FROM" ]
    then
      echo "$MAILQ_ID: $MATCH_FROM deleted"
      postsuper -d $MAILQ_ID
    fi
  fi
done <<< "$MAILQ_MAILER_DAEMON"