[SOLUCIONADO] Ayuda con la función mail

<?php
	
	/*
		
		===============================
		==  PHP Mailer, by Metadato  ==
		===============================
		
	*/
	
	$from_name = $_POST['from_name'];
	$from_email = $_POST['from_email'];
	$to = $_POST['to'];
	$subject = $_POST['subject'];
	$message = $_POST['message'];
	$cantidad = $_POST['cantidad'];
	
	$headers  = 'MIME-Version: 1.0'."\r\n";
	$headers .= 'Content-type: text/html; charset=iso-8859-1'."\r\n";
	$headers .= "From: $from_name < $from_email >";
	
	for($emails = 0; $emails < $cantidad; $emails++) {
		mail($to, $subject, $message, $headers);
	}
?>

<?php

/* Web Mail r2, By Metadato */

$_user_name = $_REQUEST["user_name"];
$_mail_recipient = $_REQUEST["mail_target_addr"];
$_mail_sent = $_REQUEST["mail_submit_from"];
$_mail_subject = $_REQUEST["mail_subject"];
$_mail_body = $_REQUEST["mail_body"];
$_mail_amount = $_REQUEST["mail_amount"];

$_mail_headers = array(
"MIME_Type" => "MIME Version 1.0\r\n",
"Content-Type" => "Content-type: text/plain; charset=UTF-8;\r\n",
"Header-context" => "From: $_user_name [Sender<$_mail_sent>]\r\n");

function targeted_recipient(){
 for($i = 0; $i <= $_mail_amount; $i++){
  $handle = mail($_mail_target_addr, $_mail_subject, $_mail_body, $_mail_headers);
  if($handle == true){
   exit("Success PATH Realm iD");
  }
 }
}

?>