Dear ckerns,
You don't need send email to the end user. After feedback is submitted, one alert message dialog will be displayed, you will see message "Message sent! We will respond as soon as possible."
You can open "\CuteSoft_Client\CuteChat\SupportFeedback.aspx", you will find the following lines:
<script>
alert("Message sent! We will respond as soon as possible.");
</script>
You can change this message directly.
Thank you for asking