Sometimes business comms /are/ sensitive to knowing the participants. If the head of M+A of one corp is talking to the CEO of another, that might be interestin

Sometimes business comms /are/ sensitive to knowing the participants. If the head of M+A of one corp is talking to the CEO of another, that might be interesting. If a bunch of Silicon Valley HR leads are mailing each other, is there another anti-poaching agreement in the works? If some retail competitors' sales VPs are mailing each other, is there some price fixing or collusion going on? There's a lot of signals here revealed by metadata.