Why wouldn't daily mail just offer their own email service @dailymail.com? Surely that would be less expensive. I doubt there would be too much juicy news flowing through yahoo's email server.

Then again as you say, Daily Mail is pretty much a tabloid. I think grabbing specifics from personal email might be a little extreme. They might, on the other hand, monitor trends to see what people are talking about in general.

That I might believe.