What is the mail called inside? "Paper Gold" or something like that. Writing letters does make a difference. I knew a woman who wrote faithfully to 20-30 inmates over the course of 7 years. She had to quit because of her family court case. It was too much, dragged on too long and took too much out of her mentally. One of the hardest things she had to do was to quit writing them. Many of them depended on those letters.