For OCONUS bases, the U.S. military transports all mail for their service members. Much of this mail ends up being junk or bulk mail. This consists of coupons, free magazines, advertisements, etc which the service member cannot use for the most part anyways. For certain bulk/junk mail it is shipped 1st class to members. Both of these mailing options increase cost where no real demand for these items exist.
It has been...