allora il phpini è configurato e funziona (aruba)

ho messo il codice che mi hai detto e di errori ne restituisce un pò,
li posto:

Notice: Undefined index: berozbox@gmail.com in /web/htdocs/www.evergreenpics.com/home/mile/mailprova.php on line 13

Notice: Undefined index: messaggio in /web/htdocs/www.evergreenpics.com/home/mile/mailprova.php on line 15

Notice: Undefined index: nome in /web/htdocs/www.evergreenpics.com/home/mile/mailprova.php on line 16

Notice: Undefined index: cognome in /web/htdocs/www.evergreenpics.com/home/mile/mailprova.php on line 16

Notice: Undefined index: email_mittente in /web/htdocs/www.evergreenpics.com/home/mile/mailprova.php on line 17

questo è il codice

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>Untitled Document</title>
</head>

<body>
<?php
ini_set('display_errors',1);
error_reporting(E_ALL|E_STRICT);

$to = $_POST['berozbox@gmail.com'];
$subject = "";
$email = $_POST['messaggio'];
$mailheaders = "From: " . $_POST['nome'] . " " . $_POST['cognome '] . " <> ";
$mailheaders .= "Reply-To:" . $_POST['email_mittente'] . " ";
mail($to, $subject, $email, $mailheaders);
?>

</body>
</html>