It was sewn on Hester Pryms blouse for everyone to see and know that she was an adulteress.
Hester Prynne wore it. Later on it the book, it can be inferred that dimmesdale had the letter carved on his chest.
The letter "A", for adultery.
The letter "A" for Adulterer. It was the punishment for the adulterer to have to wear the letter A on their clothing to cause them embarrassment and to deter others from doing the same thing.
No, as the email.