18 U.S. Code § 1702. Obstruction of correspondence
Whoever takes any letter, postal card, or package out of any post office or any authorized depository for mail matter, or from any letter or mail carrier, or which has been in any post office or authorized depository, or in the custody of any letter or mail carrier, before it has been delivered to the person to whom it was directed, with design to obstruct the correspondence, or to pry into the business or secrets of another, or opens, secretes, embezzles, or destroys the same, shall be fined under this title or imprisoned not more than five years, or both.
18 U.S. Code § 1708. Theft or receipt of stolen mail matter generally
Whoever steals, takes, or abstracts, or by fraud or deception obtains, or attempts so to obtain, from or out of any mail, post office, or station thereof, letter box, mail receptacle, or any mail route or other authorized depository for mail matter, or from a letter or mail carrier, any letter, postal card, package, bag, or mail, or abstracts or removes from any such letter, package, bag, or mail, any article or thing contained therein, or secretes, embezzles, or destroys any such letter, postal card, package, bag, or mail, or any article or thing contained therein; or
Whoever steals, takes, or abstracts, or by fraud or deception obtains any letter, postal card, package, bag, or mail, or any article or thing contained therein which has been left for collection upon or adjacent to a collection box or other authorized depository of mail matter; or
Whoever buys, receives, or conceals, or unlawfully has in his possession, any letter, postal card, package, bag, or mail, or any article or thing contained therein, which has been so stolen, taken, embezzled, or abstracted, as herein described, knowing the same to have been stolen, taken, embezzled, or abstracted—
Shall be fined under this title or imprisoned not more than five years, or both.
18 U.S. Code § 1709. Theft of mail matter by officer or employee
Whoever, being a Postal Service officer or employee, embezzles any letter, postal card, package, bag, or mail, or any article or thing contained therein entrusted to him or which comes into his possession intended to be conveyed by mail, or carried or delivered by any carrier, messenger, agent, or other person employed in any department of the Postal Service, or forwarded through or delivered from any post office or station thereof established by authority of the Postmaster General or of the Postal Service; or steals, abstracts, or removes from any such letter, package, bag, or mail, any article or thing contained therein, shall be fined under this title or imprisoned not more than five years, or both.
18 U.S. Code § 1705. Destruction of letter boxes or mail
Whoever willfully or maliciously injures, tears down or destroys any letter box or other receptacle intended or used for the receipt or delivery of mail on any mail route, or breaks open the same or willfully or maliciously injures, defaces or destroys any mail deposited therein, shall be fined under this title or imprisoned not more than three years, or both.
18 U.S. Code § 1702. Obstruction of correspondence
Whoever takes any letter, postal card, or package out of any post office or any authorized depository for mail matter, or from any letter or mail carrier, or which has been in any post office or authorized depository, or in the custody of any letter or mail carrier, before it has been delivered to the person to whom it was directed, with design to obstruct the correspondence, or to pry into the business or secrets of another, or opens, secretes, embezzles, or destroys the same, shall be fined under this title or imprisoned not more than five years, or both.