TELNET_RESULT=`expect -c " set timeout 3 spawn telnet ${TARGET_IP} 25 expect \"\" send \"HELO ${HELO_DOMAIN}\n\" expect \"${HELO_DOMAIN}\" send \"MAIL FROM: ${FROM_MAIL}\n\" expect \"Ok\" send \"RCPT TO: ${TO_MAIL}\n\" expect \"Ok\" send \"quit\n\" " | tr "\r" "\n"` if [ `echo "${TELNET_RESULT}" | grep "Relay access denied" 2> /dev/null | wc -l` -eq 0 ]; then echo "NG" else echo "OK" fi