What are the different classes of outbound and inbound military mail?
A. Each defined: a. Outbound (US to foreign) mail is called “prograde” mail and is divided into seven categories. (1) Express Mail Military Service (2) First Class letter, flats, and sound recordings (3) Priority Mail (4) Military Ordinary Mail (MOM) parcels (5) Parcel Airlift Mail (PAL) (6) Space-Available Mail (SAM) (7) Surface, second-class, third-class, and fourth-class mail b. Inbound (foreign to US) mail is called “retrograde” mail and is divided into five (5) categories.