When Edwin visits the island, Cole asks if he has received any mail... how does Edwin respond?

Edwon tells Cole that he has received mail, but that the mail will be withheld because they have agreed that Cole cannot have contact with the outside world.

“There’s been mail, but we’re not allowing you any contact with the outside world. I can tell you this: Garvey said your mom calls him almost every day to ask how you’re doing.”