She didn't communicate with any reporters over Gmail. She e-mailed The Intercept asking for a podcast transcript months ago and again to confirm her account. In fact, she had no electronic correspondence of any kind regarding the leaks (that we know of).

I recommend reading the search warrant application, paragraphs 12-19. It's the second document in this BuzzFeed story: https://www.buzzfeed.com/stevenperlberg/a-federal-government...