MQTT retain option

However, I consider this could be explained on the front page. Because the retain option is pretty accessible and available and it turns to be useless unless you configure something extra

As it is a contrib node to give feedback to the author you should open an issue on the nodes github page (link from the nodes page on flows.nodered.org)

Dang, I stand corrected on my post about. Node-Red is the broker in this case.