Short answer: it can tell you roughly where a network request came from, and that is frequently not where the person is. Some tools present that guess as a city on a map. The honest description is that you are looking at the location of a network, sometimes a data centre, and only sometimes a human being. Here is what actually arrives, and the four reasons the city on the map is unreliable. Does email tracking record the recipient's IP address? Open tracking works by putti...