PHP

// Setup SMTP transport using LOGIN authentication
$transport = new SmtpTransport();
$options = new SmtpOptions(array(
    "name" => "debugmail",
    "host" => "app.debugmail.io",
    "port" => <project port>,
    "connection_class" => "plain",
    "connection_config" => array(
        "username" => <project login>,
        "password" => <project password>
    )
));
$transport->setOptions($options);