Email introductions are a poorly understood art and are often done too hastily without careful thought. Making introductions the right way can be the best way to help two people and create a lot of value. But doing it wrong can make one of the parties look bad and can alienate one or both parties from you.
Tthe point of the GOP's Hillary email obsession is the same as its pound of her for her alleged missteps and conniving on Benghazi. That is to embarrass and discredit her as a 2016 presidential candidate. The contrived email and Benghazi flap fit neatly into the GOP's now chosen point of attack on her.
Remember the days when you needed to drive a quick increase in signups, sales or downloads and you could simply send an email to your 'list'? While you still may be able to do this in some respects, all future trends lead to more and more control being snatched from marketers and placed in the hands (literally) of the customer.