Still need a lot of work....but you get the idea. The idea is the base owner will be able to register his email inside the game on a laptop, and will have the option to activate the detection shield while he is not online. (It will not activate when players from his friends list are there, so only unknown players will trigger it). If someone approaches his base he'll get an email notification about the players attacking his base. (the email will also have a temporary unsubscribe link that deactivates the emailing system, to avoid spamming).