Take a screen grab of any random inbox and it’s sure to contain a smattering of promotional e-mails offering potential customers everything from good deals on hotels to discounts on clothing. Regardless of the product du jour, consumers are constantly being wooed to try and buy new goods and services. And that’s a good thing. It means that marketers are taking advantage of the tools and data that have been made available to them.   But marketers often live in a...