表格邮件不起作用

Question

<form action="form-to-email.php" method="post">
<p><label for='name'> Name: </label><br/><input type="text" name="Name" /></p>
<p><label for='Subject'> Subject: </label> <br/><input type="text" name="Subject" /></p>
<p><label for='email'> E-Mail: </label> <br/><input type="text" name="email" /></p>
<p><label for='message'>Message:</label><br/><textarea name='message' cols="40" rows="8">
</textarea></p>
<input type="submit" name='submit' class="submit" value="submit"/> <br/>
</form>

<?php
if(!isset($_POST['submit']))
{
    //This page should not be accessed directly. Need to submit the form.
    echo "error; you need to submit the form!";
}
$name = $_POST['Name'];
$visitor_email = $_POST['email'];
$Subject = $_POST['Subject'];
$message = $_POST['message'];


if(IsInjected($visitor_email))
{
    echo "Bad email value!";
    exit;
}

$email_from = 'email@website.com';
$email_subject = "New Form submission:\n $Subject";
$email_body = "You have received a new message from the user $name.\n".
    "Here is the message:\n $message".

$to = "businessemail@email.com";
$headers = "From: $email_from \r\n";
$headers .= "Reply-To: $visitor_email \r\n";
//Send the email!
mail($to,$email_subject,$email_body,$headers);
//done. redirect to thank-you page.
header('Location: thankyou.html');


// Function to validate against any email injection attempts
function IsInjected($str)
{
  $injections = array('(\n+)',
              '(\r+)',
              '(\t+)',
              '(%0A+)',
              '(%0D+)',
              '(%08+)',
              '(%09+)'
              );
  $inject = join('|', $injections);
  $inject = "/$inject/i";
  if(preg_match($inject,$str))
{
    return true;
  }
  else
    {
    return false;
  }
}

?>

php是一个复制/粘贴工作，用于工作。但我最近发现它现在不起作用了。我正在使用godaddy来托管使用cPanel Hosting。