Failed to load pdf using php mail function

Hi Team

I am unable to view pdf and below is my logic for attaching pdf, please advice me i have been stuck with this issue for way to long. Advice me how to attach many docs after. When i try to open its said failed to load "Expected: application/pdf (.pdf); found: text/plain (.txt)"

  " . $eol;
   $headers .= "MIME-Version: 1.0" . $eol;
   $headers .= "Content-Type: multipart/mixed; boundary=\"" . $separator . "\"" . $eol;
   $headers .= "Content-Transfer-Encoding: binary";
   $headers .= "This is a MIME encoded message." ;
    $headers .="Content-Length:  . filesize($filenameee)";
    $headers .="Accept-Ranges: bytes" ;
    @readfile($filenameee);

    $body .= "Monthly income: {$income}";
	$body .= "";
	$body .= "Town: {$town}";
	$body .= "";
	$body .= "Upload bankstatement  {$bankstatement}";
	$body .= "";
	$body .= "Upload payslip: {$payslip}";
	$body .= "";
	$body .= " ";
	// message
  //$body = "--" . $separator . $eol;
  $body .= "Content-Type: text/plain; charset=\"iso-8859-1\"" . $eol;
  $body .= "Content-Transfer-Encoding: binary" . $eol;
  $body .= $message . $eol;
	// attachment
 $body .= "--" . $separator . $eol;
 $body .= "Content-Type: application/pdf; name=\"" . $filenameee . "\"" . $eol;
 $body .= "Content-Transfer-Encoding: binary" . $eol;
 $body .= 'Content-Disposition: inline; $filenameee="' . $filenameee . '"';
$body .= $content . $eol;

$body .= "";
	
$body .= "";
 
?>