Отправка html версии письма с картинкой (картинка не отправляется)

$subj = "Письмо с сайта"; // тема входящего письма
    $from = "test@test.ru"; // от кого письмо
    $email =  substr(htmlspecialchars(trim($_POST['email'])), 0, 50); 
 
$file_name = "5.jpg";
    $bound = "spravkaweb-1234";
    $headers = "From: $from\n";
    $headers .= "Mime-Version: 1.0\n";
    $headers .= "Content-Type: multipart/alternative; boundary=\"$bound\"\n";
    $body = "--$bound\n";
    $body .= "Content-type: text/html; charset=\"utf-8\"\n";
    $body .= "Content-Transfer-Encoding: 8bit\n\n";
    $body .= "<h3>Привет</h3>Это проба отправки письма с прикрепленной картинкой.<br>А вот и сама картинка:<br>
    <img src=\"".basename($file_name)."\">";
    $body .= "\n\n--$bound\n";
    $body .= "Content-Type: image/jpeg; name=\"".basename($file_name)."\"\n";
    $body .= "Content-Transfer-Encoding:base64\n\n";
    //$body .= "Content-ID: <spravkaweb_img_1>\n\n";
    $f = fopen($file_name,"rb");
    $body .= base64_encode(fread($f,filesize($file_name)))."\n";
    $body .= "--$bound--\n\n";
    mail($email, $subj, $body, $headers);

$headers .= "Content-Type: multipart/related; boundary=\"$bound\"\n";

$body .= "Content-Transfer-Encoding:base64\n\n";
    //$body .= "Content-ID: <spravkaweb_img_1>\n\n";
    $f = fopen($file_name,"rb");
    $body .= base64_encode(fread($f,filesize($file_name)))."\n";
    $body .= "--$bound--\n\n";