That goes with how cautious the person is. It is illegal for a person in the Supreme Court to be involved in such an illegal act. The law honors to prosecute the person and charge him. The one who was written to by the judge should file a case against him.
You'd think the Judge thought his emails were private emails like everyone elses emails are but apparently not. Judges are to uphold a different set of standards than other people do. Judges are to set GOOD examples all the time even in seemingly private emails.