KSHシェルスクリプトから変数を呼び出す方法

#!/bin/sh
# This script is for checking the status of SSHD2 Number of  connections

CHKOUT="Please also Check the Number of ORPHAN / DEFUNCT Process on `hostname` :"
DFOUT=`/usr/bin/ps -eaf | grep defucnt`
SHCOUNT=`/usr/bin/pgrep sshd2|wc -l`
if [ $SHCOUNT -gt 150 ]

then
    mailx -s "Warning! : `hostname` has more than $SHCOUNT  SSHD2 Connections running Please Check!" [email protected]  << EOF

`echo  $CHKOUT`
`echo "=========================================================="`
`echo  $DFOUT`

EOF
fi

=========================================

「DFOUT」変数の出力を取得できません。正しい方法を提案してもらえますか？

===================
Edited code that is working nice..

#!/bin/sh
# This script is for checking the status of SSHD2 Number of  connections
CHKOUT="Please also Check the Number of ORPHAN / DEFUNCT Process on `hostname` :"
PS=`/usr/bin/ps -eaf | grep -v grep| grep defunct`
SHNT=`/usr/bin/pgrep ssh|wc -l`

if [ $SHNT -gt 15 ]

then

        mailx -s "Warning!  `hostname` has more than $SHNT SSHD2 Connections running Please Check!"  [email protected]   << EOF
        Hi Team,

        $CHKOUT
        ===========================================================
        $PS

EOF
fi