Can I get email when user logs in?

<?php
/*  blank_plugin

       Note that the start and end php tags breaks the plugin
       and are there only for highlighting purposes
*/
// Handle event
$e = &$modx->Event;
switch ($e->name) {
case "OnWebLogin":
$Name = "MODx Admin"; //senders name
$email = "[email protected]"; //senders e-mail adress
$recipient = "[email protected]"; //recipient
$mail_body = $_SESSION['webFullname']." logged in..."; //mail body
$subject = "Subject for reviever"; //subject
$header = "From: ". $Name . " <" . $email . ">\r\n"; //optional headerfields

mail($recipient, $subject, $mail_body, $header); //mail command 
  break;

case "OnWebLogout":
  // code here
  break;

//case "":
  // code here
//  break;

default: "";

  return;
}
?>