The restricted materials listed in DMM 601.11.7–20 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.
