Putting up a roadblock

A media baron sent out an email to his employees explaining the spate of exits at his home-grown entertainment company. The email addressed certain issues and named a functional head in particular, giving details about the reason for firing him. The functional head in question responded to the media baron, and marked it to all the employees, with pointed explanations to all the allegations raised against him. In order to stem the damage the email might cause, the media baron got the entire company's server blocked, and the mail removed from the system.