This is laughable. Metadata is stored all over the world from trillions of connections. There are billions of metadata tags on the DNC hacks.
Where you fail is that somebody took one set, fixed it the way they wanted, and said “This one set is the holy grail!!!”.
Well, emails frequently get transferred out of and into systems, and routed differently depending on traffic. A whole batch that all have virtually the same routing is the most SUSPECT thing I have ever seen.