18 U.S.C. § 877: Mailing threatening communications from foreign country

Whoever knowingly deposits in any post office or authorized depository for mail matter of any foreign country any communication addressed to any person within the United States, for the purpose of having such communication delivered by the post office establishment of such foreign country to the Postal Service and by it delivered to such addressee in the United States, and as a result thereof such communication is delivered by the post office establishment of such foreign country to the Postal Service and by it delivered to the address to which it is directed in the United States, and containing any demand or request for ransom or reward for the release of any kidnapped person, shall be fined under this title or imprisoned not more than twenty years, or both. Whoever, with intent to extort from any person any money or other thing of value, so deposits as aforesaid, any communication for the purpose aforesaid, containing any threat to kidnap any person or any threat to injure the person of the addressee or of another, shall be fined under this title or imprisoned not more than twenty years, or both. Whoever knowingly so deposits as aforesaid, any communication, for the purpose aforesaid, containing any threat to kidnap any person or any threat to injure the person of the addressee or of another, shall be fined under this title or imprisoned not more than five years, or both. Whoever, with intent to extort from any person any money or other thing of value, knowingly so deposits as aforesaid, any communication, for the purpose aforesaid, containing any threat to injure the property or reputation of the addressee or of another, or the reputation of a deceased person, or any threat to accuse the addressee or any other person of a crime, shall be fined under this title or imprisoned not more than two years, or both.