image not showing in email

[contra10]

ok while testing in on my local host i used an iframe to capture the image that i wanted

 

<?php
$to = ($email);
$subject = "Verification";
//create a boundary string. It must be unique 
//so we use the MD5 algorithm to generate a random hash
$random_hash = md5(date('r', time()));
$from = "[email protected]";
$headers = "From: $from";
//add boundary string and mime type specification
$headers .= "\r\nContent-Type: multipart/alternative; boundary=\"PHP-alt-".$random_hash."\""; 
//define the body of the message.
ob_start(); //Turn on output buffering
?>

--PHP-alt-<?php echo $random_hash; ?>  
Content-Type: text/html; charset="iso-8859-1" 
Content-Transfer-Encoding: 7bit

<?php echo "<IFRAME src= 'http://localhost/image.html' width='200' height='100' FRAMEBORDER='0'></iframe>";?>
<div style="width:800px;height:400px;border:4px dashed blue;">

<h2>You have sucessfully registered </h2><br>
<table bgcolor="#0183AE"><tr><td>
<?php

echo "To contine to verify your account please follow the link<a href='http://localhost/verify.php?v=$userid' target='_blank'>Verify Account</a>";
?>
</td></tr></table>
</div>

--PHP-alt-<?php echo $random_hash; ?>--
<?php
//copy current buffer contents into $message variable and delete current output buffer
$message = ob_get_clean();
//send the email
$mail_sent = @mail( "$to", $subject, $message, $headers );

?>

 

it showed in the email

 

but now im on the web and i change localhost to my url name and it doesn't show at all, i of course tried the link and it shows and i also tried to use the more practical <img src""/>

 

still no luck