Почта с аттачем, приходит кол вместо файла

$filename="3500.zip";
$file ='downloads/3500.zip';
$file_size = filesize($file);
$handle = fopen($file, "r");
$content = fread($handle, $file_size);
fclose($handle);
$content = base64_encode($content);
 
$from="ya";
$to="pochya@gmail.com";
$bound="razdelitel-12345";
$headers="From:$from \r\n";
$headers.="To:$to \r\n";
$headers.="MIME-Version:1.0 \r\n";
$headers.="Content-Type:multipart/mixed; boundary=$bound \r\n";
$headers.="--$bound \r\n";
$headers.="Content-type: text/plain; charset=\"windows-1251\" \r\n";
$headers.="Content-Transfer-Encoding: quoted-printable \r\n\r\n";
$headers.="Hi \r\n Heres that my file \r\n";
$headers.="--$bound \r\n";
$headers.="Content-Type:application/octet-stream; name=$filename \r\n";
$headers.="Content-Transfer-Encoding:base64 \r\n";
$headers.="Content-Disposition:attachment \r\n\r\n";
$headers.=$content. "\r\n\r\n";
$headers.="$bound--";

$headers  = 'MIME-Version: 1.0' . "\r\n";
$bound = "yambofile";
            $headers .= "Content-Type: multipart/mixed; boundary='$bound'\n";
            
            $message = "\n\n--$bound\n";
            $message .= "Content-type: text/html; charset=\"utf-8\"\n";
            //$message .= "Content-Transfer-Encoding: 8bit\n\n";
            $message .= $message1;
            
            $file_name = $data['fullFileName'];
            $file=fopen($file_name,"rb");
            
            $message .= "\n\n--$bound\n";
            $message .= "Content-Type: application/octet-stream; name=\"".basename($file_name)."\"\n";
            $message .= "Content-Transfer-Encoding:base64 \n";
            $message .= "Content-Disposition:attachment; name=\"".basename($file_name)."\"\n\n";
            $message .= chunk_split(base64_encode(fread($file,filesize($file_name))));
            $message .= "\n--$bound--\n";
$headers .= "To: $to\r\n";
$headers .= "From: {$FEEDBACK_CONFIG[$type_message]['MODULE_MAIL_FROM_EMAIL']}\r\n";
mail($FEEDBACK_CONFIG[$type_message]['MODULE_MAIL_TO_EMAIL'], $this->dataOrder['subject'], $message, $headers)

$content = chunk_split(base64_encode($content));
 
$headers.="Content-Type: multipart/mixed; boundary=\"$bound\"\r\n\r\n";
// ..
$headers.="Content-Disposition: attachment; filename=\"$filename\"\r\n\r\n";