script to delete dovecot users

#!/bin/bash
#
# deldovecotuser - for deleting virtual dovecot users
#
if [ ! $# = 1 ]
then
echo -e "Usage: $0 username@domain"
exit 1
else
user=`echo "$1" | cut -f1 -d "@"`
domain=`echo "$1" | cut -s -f2 -d "@"`
if [ -x $domain ]
then
echo -e "No domain given\nUsage: $0 username@domain: "
exit 2
fi
fi
read -n 1 -p "Delete user $user@$domain from dovecot? [Y/N]? " REPLY
echo
case $REPLY in
y | Y)
new_users=`grep -v $user@$domain /etc/dovecot-users`
new_passwd=`grep -v $user@$domain /etc/dovecot-passwd`
new_vmaps=`grep -v $user@$domain /etc/postfix/vmaps`
new_vhosts=`grep -v $domain /etc/postfix/vhosts`
echo "Deleting $user@$domain from /etc/dovecot/users"
echo "$new_users" > /etc/dovecot-users
echo "Deleting $user@$domain from /etc/dovecot-passwd"
echo "$new_passwd" > /etc/dovecot-passwd
echo "Deleting $user@$domain from /etc/postfix/vmaps"
echo "$new_vmaps" > /etc/postfix/vmaps
echo "Deleting $domain from /etc/postfix/vhosts"
echo "$new_vhosts" > /etc/postfix/vhosts
postmap /etc/postfix/vmaps
postfix reload
read -n1 -p "Delete all files in /home/vmail/$domain/$user? [Y/N]? " DELETE
echo
case $DELETE in
y | Y)
echo "Deleting files in /home/vmail/$domain/$user"
rm -fr /home/vmail/$domain/$user
rm -fr /home/vmail/$domain
;;
* )
echo "Not deleting files in /home/vmail/$domain/$user"
;;
esac
;;
* )
echo "Aborting..."
;;
esac