PHP Code email Autoreply Help please

i have a page in my website with PHP , that do a customer comment and it send me an emails for those comments , and then send an automatic email to the customer , but my only problem is that i want the customer to receive the email as it is from the email i got my emails on , but when the customer received the email it received as my username in my host site @ hostsite.com

i want to solve this please thanks.

here is the code :


<?php
require_once('recaptchalib.php');

$errFlag=0;
$showForm=1;

//KEEP YOUR PRIVATE KEY HERE
$privatekey = ""; // << replace this key with yours


function isValidEmail($email){
return filter_var(filter_var($email, FILTER_SANITIZE_EMAIL), FILTER_VALIDATE_EMAIL);
}

if (isset($_POST["submit"])){
$name=$_POST['name'];
$lname=$_POST['lname'];
$phone=$_POST['phone'];
$email=$_POST['email'];
$message=$_POST['message'];

if(empty($_POST))
{
$errMsg[]="Please enter all the field.";
}
if(empty($name))
{
$errMsg[]="Please enter your First Name.";
}
if(empty($lname))
{
$errMsg[]="Please enter your Last Name.";
}
if(empty($phone))
{
$errMsg[]="Please enter phone number.";
}
elseif(!is_numeric($phone))
{
$errMsg[]="Please enter valid phone number.";
}
if(empty($email))
{
$errMsg[]="Please enter an email address.";
}
elseif(!isValidEmail($email))
{
$errMsg[]="Please enter an valid email address.";
}

if(empty($message))
{
$errMsg[]="Please enter message.";
}

/* captcha validation */
$resp = recaptcha_check_answer ($privatekey,
$_SERVER["REMOTE_ADDR"],
$_POST["recaptcha_challenge_field"],
$_POST["recaptcha_response_field"]);

if (!$resp->is_valid) {
// What happens when the CAPTCHA was entered incorrectly
$errMsg[]="The CAPTCHA wasn't entered correctly. Please try it again.";
}

if(empty($errMsg))
{
// if there is no error then send a mail
$ToEmail = '[email protected]'; // CHANGE YOUR EMAIL WHERE YOU WANT TO RECEIVE THE CONTACT FORM SUBMITTED BY USERS...
$EmailSubject = 'Customer Comments ';
$mailheader = "From: ".$email."\r\n";
$mailheader .= "Reply-To: ".$email."\r\n";
$mailheader .= "Content-type: text/html; charset=iso-8859-1\r\n";
$MESSAGE_BODY = "Name: ".$name." ".$lname."<br>";
$MESSAGE_BODY .= "Phone: ".$phone."<br>";
$MESSAGE_BODY .= "Email: ".$email."<br>";
$MESSAGE_BODY .= "Comment: ".nl2br($message)."<br>";
mail($ToEmail, $EmailSubject, $MESSAGE_BODY, $mailheader) or die ("Failure");
if(mail)
{
$msg="Thank your for submitting the form, we will contact your shortly.";
$showForm=0;
mail($email, "Thank your for submitting.", $msg);
} else
{
$msg="Some errors occured, please try again in a while.";
}
} else
{
$errFlag=1;
}



}

?>
<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns="urn:schemas-microsoft-comfficeffice" xmlns="http://www.w3.org/TR/REC-html40">

<head>
<link rel="shortcut icon"
href="http://www.divineenergyhealing.co/favicon.ico">
<meta http-equiv="Content-Language" content="en-us">
<meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
<title>Customer Comments</title>
<meta name="description" content="Customer Comments">
<link rel="File-List" href="reiki website/Reiki/Customer Comments_files/filelist.xml">

<base target="_self">
<!--[if !mso]>
<style>
v\:* { behavior: url(#default#VML) }
o\:* { behavior: url(#default#VML) }
.shape { behavior: url(#default#VML) }
</style>
<![endif]--><!--[if gte mso 9]>
<xml><o:shapedefaults v:ext="edit" spidmax="1027"/>
</xml><![endif]-->

<style type="text/css">
/* error and success msg */
#errMsg { background-color:#febbbb; border:1px solid #d31a1c; color:#d31a1c; font-size:12px; padding:10px; margin-bottom:15px;}
#successMsg { background-color:#ffffff; border:1px solid #ffffff; color:#000000; font-size:16px; padding:10px; margin-bottom:15px; margin-top:25px;}

#contact_form { position: absolute; width: 888px; height: 365px; z-index: 1; left: 190px; top: 128px;}

#contact_form form label { display:block;}
contact_form p { margin-bottom:10px;}
.auto-style1 {
font-family: "Times New Roman", Times, serif;
font-weight: bold;
color: #FFFFFF;
}
</style>

</head>

<body link="#0000FF" vlink="#800000" alink="#FF0000">

<p>
 </p>
<p align="left"> </p>
<p> </p>
<p> </p>
<p> </p>
<p> </p>
<p> </p>
<p>        </p>
<p> </p>
<p> </p>
<p> </p>
<p> </p>

<p align="left"> </p>

<div id="contact_form" style="left: 192px; top: 102px">
<?php
if($errFlag)
{
echo "<div id='errMsg'>";
foreach($errMsg as $val)
{
echo "- ";
echo $val;
echo "<br />";
}
echo "</div>";
}
?>
<?php if($showForm){ ?>
<form action="<?php echo $_SERVER['PHP_SELF']; ?>" name="contact_form" method="post">
<p>
<label for="name">First Name</label>
<input name="name" type="text" id="name" value="<?php if (isset($_POST['name'])) echo $_POST['name']; ?>" />
</p>
<p style="height: 45px">
<label for="lname">Last Name</label><input name="lname" type="text" id="lname" style="width: 148px; height: 22px" value="<?php if (isset($_POST['lname'])) echo $_POST['lname']; ?>" />
</p>
<p>
<label for="phone">Phone Number</label>
<input name="phone" type="text" id="phone" value="<?php if (isset($_POST['phone'])) echo $_POST['phone']; ?>" />
</p>
<p>
<label for="email">Email Address</label>
<input name="email" type="text" id="email" value="<?php if (isset($_POST['email'])) echo $_POST['email']; ?>" />
</p>
<p>
<label for="message">Customer Comments</label>
<textarea name="message" id="message" style="width: 247px; height: 84px" rows="999"><?php if (isset($_POST['message'])) echo $_POST['message']; ?></textarea>
</p>
<p>
<?php
//PUT YOUR PUBLIC KEY HERE
$publickey = ""; // << replace this key
echo recaptcha_get_html($publickey);
?>
</p>

<p><input name="submit" type="submit" value="Submit" /> <input name="reset" type="reset" value="Reset" /></p>
</form>
<?php } else { ?>
<div id="successMsg" class="auto-style1">Thanks for your comments and questions we appreciate that you took the time to send us..</div>
<?php }?>
</div>

</body>

</html>