Disk space check

#!/bin/sh
EMAILS="user@domain user2@domain.... etc"
MESSAGE=/tmp/tmp.$$
df -h | tr "%" " " | grep "/" | awk ' { if ($5 >= 95) print $6" currently at "$5"% usage leaving "$4" of "$2" availible on "$1 "n" } ' > $MESSAGE
TEST=`cat $MESSAGE | wc | awk ' { print $1 } '`
if [ "$TEST" -gt 0 ]
then
for i in $EMAILS
do
/usr/bin/mailx -s "`hostname | tr [:lower:] [:upper:] ` OVER CAPACITY" $i < $MESSAGE
done
fi
rm $MESSAGE