Were letters actually been delivered to and from the warfront during WW2?

Answer 1

Yes. Mail was the highest of moral builders.

Answer 2

Yes, they were. Mail from home was a very important moral booster for the average soldier. Letters going home from the front were important too. If you were serving overseas your letter home would be censored by one of your officers. In this way any privileged information would not leave the front, and nothing would be discovered if the enemy captured the mail. Your movements, location, action that you had seen were usually blacked out.

Letters from the homefront were actually put on microfish and transported across the ocean. Then they were transferred back onto paper and delivered to the soldiers. This resulted in a huge savings in wieght and volume on the transport ships and planes. The official name of this program was called "V Mail", with the "V" short for "victory".

Answer 3

Those letter were photographed as VMAIL. When they got home or to the warfront they were reprinted on photo paper (complete with blanking-out that censors did on them).