netcat -z localhost 8287
if [ $? -ne 0 ]; then
  echo " Connection refused" |/usr/lib/sendmail -s "Port  doesn't function "  mit@gmail.com
else
  echo "open"
fi

if ! nc -z $host $port; then
    echo "This message intentionally left blank" | mail -s "TCP port $port is not open on $host" $emailaddress
else
    : Do whatever you wanted to do
fi

/usr/lib/sendmail -oi -t << EOF
Subject: Port doesn't function
To: mit@gmail.com

Connection refused
EOF

echo Connection refused | mailx -s "Port doesn't function" mit@gmail.com