“ The whole claim of the complainant rests upon the averment that a very large majority of the letters that are addressed to the defendant company by its own name alone are in reality intended for the complainant. This fact does not clothe the complainant with the legal right to insist that the Chicago postmaster shall be directed to deliver all mail of the character in question to a corporation other than that to which the mail is addressed. ”

“ There the Postoffice Department was assuming to act under a statute giving it the power to refuse to deliver mail matter to an individual guilty of fraud in his business, and this court held that the case made did not show that the plaintiff in error had been guilty of any conduct that could be held to be a fraud under the statute under which the Postoffice Department was acting. ”

“ A court in such case ought not to interfere in the administration of a great Department like that of the Postoffice by an injunction which directs the Department how to conduct the business thereof, where the party asking for the injunction has no clear right to it. ”