koenbuntu@koenbuntu-B5130M:/var/www/pms$ cat mail.php
<?php
$to      = 'mailnaarkoen@gmail.com';
$subject = 'the subject';
$message = 'hello';$headers = 'From: webmaster@example.com' . "\r\n" .
    'Reply-To: webmaster@example.com' . "\r\n" .
    'X-Mailer: PHP/' . phpversion();
echo ' start sending mail at:'.date('H:i:s', time());
echo "\r\n";
mail($to, $subject, $message, $headers);
echo 'mail has been sent at '.date('H:i:s', time());koenbuntu@koenbuntu-B5130M:/var/www/pms$ php5 mail.php
 start sending mail at:14:40:42
mail has been sent at 14:41:47
koenbuntu@koenbuntu-B5130M:/var/www/pms$