Okla. Stat. tit. 21, § 21-1781: Letters, opening and reading - Publishing letters

Every person who willfully opens or reads, or causes to be read,

any sealed letter not addressed to himself, without being authorized

so to do, either by the writer of such letter or by the person to

whom it is addressed, and every person who without like authority

publishes any letter, knowing it to have been opened in violation of

this section or any part thereof, is guilty of a misdemeanor.