Example:

<?php 

require_once 'library/EngagePod4.php';

$username = "";
$password = "";
$databaseID = "";
$mailingID = "";
$contactsList = "";

$pod = new EngagePod4($username,$password);
$lists = $pod->GetLists(18);
var_dump($lists);

$recipientID = $pod->addContact($databaseID, true, array("name" => "christos", "email" => "[email protected]"));
$mailingID = $pod->sendEmail($mailingID, $databaseID, "API Mailing Test - ".date("d/m/Y H:i:s",time()), time() + 60);
var_dump($mailingID);

?>