This is where the payment plugin updates the order status inside plgVmOnPaymentResponseReceived function:
$modelOrder = new VirtueMartModelOrders();
$orderStatus = "C";
$order['order_status'] = $orderStatus;
$order['virtuemart_order_id'] = $virtuemart_order_id;
$order['customer_notified'] = 0;
$modelOrder->updateStatusForOneOrder($virtuemart_order_id, $order, TRUE);
$cart->emptyCart();
Changing $order['customer_notified'] = 0 to 1 its not sending either, this part only updates the order status, I can't find the code that sends the email. Where inside Paypals plugin code does it send or tell VirtueMart to send the emails?