the reply to address should not contain the name, it should only contain the email field:
<?php echo (isset($_POST['Email'])?$_POST['Email']:""); ?>
to troubleshoot the email sending, add the following code on the success page to write the session contents:
<pre><?php @session_start(); var_dump($_SESSION); ?></pre>
this will contain the status of passing the email to the SMTP server.
What does that status say?
If it says the status is success, then you will need to contact the host to determine why the SMTP server is not relaying the email.
Universal Email compiles the email message and passes it to the SMTP server. it is then up to the SMTP server to relay the email message, If the SMTP server is not relaying the email, you need to work with the host to determine why.