Any person who, not being a witness in a court of law, without the consent of the sender or addressee or receiver or otherwise than in pursuance of his or her duties, opens or tampers with or divulges the contents or substance of any telegram or discloses its existence otherwise than by delivering it or giving a copy thereof to the person to whom he or she is authorised to deliver it or to give such copy or who maliciously or wilfully misdelivers, puts the incorrect time on, secretes, intercepts, destroys, makes away with, alters or omits to transmit or deliver or presents or delays the delivery or transmission of any telegram or makes use for his or her own purposes of any knowledge he or she may acquire of the contents thereof, is guilty of an offence and liable on conviction to a fine or to imprisonment for a period not exceeding two years or to both a fine and such imprisonment.