是否知道如何通过phpmail嵌入图像而不使用phpmailer?

我宁愿使用我已经拥有的,如果可能的话,只需在上面添加一个图片。以下是迄今为止我的代码:

$to = $Email;
$subject = "$auth->first_name $auth->last_name left you a comment";
$message =  "$auth->first_name $auth->last_name left you a comment: <br /><br /> <a href='http://www.blah.org/Profile.php?id=" . $prof->id . "'>Click here to view</a>";
$from = "blah<noreply@blah.org>";
$headers  = 'MIME-Version: 1.0' . "\r\n";
$headers .= 'Content-type: text/html; charset=iso-8859-1' . "\r\n";
$headers .= "From: $from";
mail($to, $subject, $message, $headers);