You people ever hear of the computer, they have been around awhile and can do tasks like comparing emails much quicker than a human can. A company called IBM built a popular line of computers that could accomplish the task................ back in the 50's.
Meta data mining software, pretty standard stuff, legal firms leverage it all the time. Trump doesn't use email at all, of course he doesn't understand any of this technology. But he shoots is mouth off and his minions don't bother to investigate further.
Searches can find specific targets. Consider the following, both are referring to the same thing.
1) Thank you for your donation to the Clinton foundation. Very much appreciated. Since you have donated to my charity, call my admin and she will set you up with an appointment
2) It's great to help people out when you have the means to do that, not everyone does. If we get the chance, we could discuss other possibilities at some point when we get the chance on a variety of topics. Let me know if you have time at some point to do that and we should make it happen
People would see #2 right away. Computers? A lot more challenging. What keywords or phrases are you going to program to hit in #2 for auto searching? You people who think computers work by magic are a hoot