PHP emailing failing on WIMP

I've got a WordPress site with a contact form that works fine on my MAMP environment, but when I publish to my clients WIMP server I get a failure.

I am not at all familiar with WIMP environments- how does one go about checking PHP error logs
Offhand, are there issues with PHP emailing on WIMP that would be causing this?

Code:

<?php 

if ($_POST["contact_name"]<>'') { 
    $ToEmail = '[email protected]'; 
    $EmailSubject = 'New contact message';  
    $mailheader = "From: ".$_POST["contact_email"]."\r\n";  
    $mailheader .= "Reply-To: ".$_POST["contact_email"]."\r\n"; 
    $mailheader .= "Content-type: text/html; charset=iso-8859-1\r\n";  
    $MESSAGE_BODY = "<b>Name:</b> ".$_POST["contact_name"]."<br>";  
    $MESSAGE_BODY .= "<b>Email:</b> ".$_POST["contact_email"]."<br>";
    mail($ToEmail, $EmailSubject, $MESSAGE_BODY, $mailheader) or die ("Failure"); 

?> 
<h4>Your message was sent. We will be in touch with you shortly.</h4>
<?php 
} else { 
<form id="contact-form" name="contact" method="post" action="#">
<label for="contact-name">Name *</label>
<input type="text" id="contact-name" name="contact_name" tabindex="1" class="required"/>
<label for="contact-email">Email</label>
<input type="text" id="contact-email" name="contact_email" tabindex="2" class="email" />
<input type="submit" id="contact-submit" name="contact_submit" value="" tabindex="8" />
</form>
<?php 
}; 
?>

Solution

Windows does not have a built in email server like unix type OSs tend to have. You need to configure php.ini to add SMTP server information through which to relay email.