They state this is to better target ads to you, enforcement of their terms, or other reasons they may deem necessary. We’d guess it’s also about building one big ol’ permanent profile on you. Not cool.
Perhaps you consider this a fair exchange for free email service. Maybe you don’t. Point is, you probably would like the ability to send and receive a truly private email every now and then. Right? SecureMyEmailTM lets you choose what you share with your email provider. And what you don’t.