Delete courier mailbox files than 90 days

cleanfiles.sh

#!/bin/bash

TODAY=$(date)
HOST=$(hostname)
echo "-----------------------------------------------------"
echo "Date: $TODAY"
echo "Host:$HOST"
echo "-----------------------------------------------------"
echo ""
diskbefore="`df -h / | awk '{ print $4 }' | tail -n 1| cut -d'%' -f1`"
echo "before cleaning : "$diskbefore
echo "cleaning files +90 days ....."
countfiles="`find . /MAILBOX/mail/*@domain.com/ -depth -type f -atime +90 ! -name courierimapuiddb | wc -l`"
find . /MAILBOX/mail/*@domain.com/ -depth -type f -atime +90 ! -name courierimapuiddb -delete > /dev/null
echo ""
diskafter="`df -h / | awk '{ print $4 }' | tail -n 1| cut -d'%' -f1`"
echo "after cleaning : "$diskafter
echo "deleted files "$countfiles
echo ""
echo ""
exit