[RESOLVED]What broke in my send mail script?

[Kasracer]

[EDIT]Nevermind guys.I figured everything out. Made it much cleaner and decided to use $_GET instead.

It worked when I first opened the website. Now, a few weeks later, everytime I try to send myself something it doesn't work. What broke?

The PHP (sendmail.php):

<?php
//Options
$mailto = "[email protected]"; 
$subject = "Services Inquiry"; 
$redirect = "successmail.php"; 
$errordirect = "errormail.php";
$go = false;
//Put vars from form into the body of the e-mail
foreach($HTTP_POST_VARS as $key => $value) { 
    if($value == ""){
    $go = false;
    break;
    }else if($key == "Submit"){
    }else if($key == "Regards"){
        $subject = $value;
    }else{
      $message .= $key . ':  ' . $value; 
      $message .= "\n";
      }
      $go = true;
} 
if($go)
{
    if (@mail($mailto, $subject, $message, "From: BinaryIdiot.com Inquiry")) { 
          header("Location: $redirect"); 
    } else { 
          header("Location: $errordirect"); 
    } 
}else{
    header("Location: $errordirect");
}
?>

The XHTML (contact.php):

<form action="sendmail.php" method="post">
<p>Name: <input name="Name" type="text" size="25" maxlength="25" /></p>
<p>E-Mail: <input name="Email" type="text" size="25" maxlength="30" /></p>
<p>Subject: <input name="Regards" type="text" size="40" maxlength="40" /></p>
<p>Question/Comment/Suggestion/Inquiry:</p><p><textarea name="Message" cols="65" rows="14"></textarea></p>
<p><input name="Submit" type="submit" /><input name="Reset" type="reset" /></p>
</form>

Sorry for the dumb PHP questions but I learn best by working on projects and I've tried to figure this out myself and can't figure it out.