send mail xampp

Hello.

PHP.INI

sendmail_path = "\"C:\xampp\sendmail\sendmail.exe\" -t"
;sendmail_path="C:\xampp\mailtodisk\mailtodisk.exe"

SENDMAIL.INI

smtp_server=smtp.live.com
smtp_port=25

auth_username=user@outlook.com
auth_password=password

force_sender=user@outlook.com

SEND.PHP

<?php

$message = "Hello ;)";

$message = wordwrap($message, 70);

mail('user@outlook.com', 'Subject', $message);

?>

O que está errado?