Backing up Cyrus mail server database

backup_remote_mail.sh

#!/bin/bash

DEST=/backup1/example/mail/spool/
TEST=/backup1/BACKUP.txt

if [ ! -f $TEST ]; then
    echo "Backup disk not mounted!"
    exit
fi

echo "Rsyncing..."
rsync --bwlimit=5000 --delete -a -v example.com:/var/spool/imap $DEST
result=$?
if [ $result -eq 0 ]; then
    echo "Rotating..."
    rm -fr $DEST/imap.4
    mv $DEST/imap.3 $DEST/imap.4
    mv $DEST/imap.2 $DEST/imap.3
    mv $DEST/imap.1 $DEST/imap.2
    cp -al $DEST/imap $DEST/imap.1
else
    echo "Backup FAILED! Not rotating."
fi