Afghan Post. offers a P.O. Box to individuals, businesses, etc. that want to receive all types of mail by this method of delivery. P.O. Box mail is available during the established service hours at the all Post offices the customer chooses to receive this service. One of the main advantages of having a p.o.box is that the mail is available for pick up in the early hours of the day and, in some cases, 24 hours a day.