The restricted materials listed in DMM 601.12.7 through 601.12.20 are prohibited in international mail, unless specifically permitted in the Individual Country Listings in the IMM. The restricted materials include intoxicating liquor; matter emitting obnoxious odor, liquids and powders, motor vehicle master keys, battery–powered devices, odd–shaped items in letter–size envelopes, abortive and contraceptive devices, and building construction material.
