A script for monitoring Exim undelivered mail queue.

mailQueue.sh

#!/usr/bin/env bash
#
#  A script for monitoring Exim undelivered mail queue.
#  intended to be used in conjunction with a cron job.
#
# Email recipient 
alertEmail=#Add email here.
# Set the alert threshold here
queueThreshold=100 

# result log location
resultLog="/tmp/mail-Queue.log"

# Variables
currentQueue="`exim -bpc`"
logTime=$(date)

if [ "$currentQueue" >= "$queueThreshold" ]; 
  then
    echo "Mail Queue Threshold observed." > $resultLog
    echo $logTime >> $resultLog
    echo "Current queue is: $currentQueue" >> $resultLog
    echo "Mail queue summary" >> $resultLog
    echo "`exim -bp | exiqsumm -c`" >> $resultLog
# Optional search with greater detail to be used in lieu of preceding line.
    #echo "`exim -bp | exipick -bpc <search term>`">> $resultLog
    mail -s "Mail Queue Threshold observed for `hostname` : $currentQueue" $alertEmail < $resultLog
    cat $alertEmail
    exit
else 
  exit
fi
# Optional garbage collection because tmp is temp. 
#  Comment rm and uncomment cat for debugging alert mail send issues.
#cat $resultLog
rm  $resultLog