Mail Any mail you send from here must carry a return address on the envelope whether you use the "free" privilege or use stamps. However, use your home address-that is, the place where you will spend your leave or furlough-not your APO. For your information, air mail costs 8c in the States and not 6c. If you are sending air mail letters to civilian friends overseas check with the Post Office for the rates that apply to the particular locality before you deposit the letter. If you are in a redeployed unit, we may have some mail waiting here for you. If we do, it will be distributed through your Unit Mail Orderly. Be sure to be on hand when he holds a mail call.