law: Indian Post Office Act, 1898 
  58. Penalty for contravention of section 4 
  (1) Whoever-
  (a) conveys otherwise than by post, a letter
  
  within the exclusive privilege conferred on the Central Government by section
  
  4, or
  (b) performs any service incidental to
  
  conveying, otherwise than by post, any letter within the exclusive privilege
  
  aforesaid, or
  (c) sends, or tenders or delivers in order to
  
  be sent, otherwise than by post, a letter within the exclusive privilege
  
  aforesaid, or
  (d) makes a collection of letters excepted
  
  from the exclusive privilege aforesaid for the purpose of sending them otherwise
  
  than by post, shall be punishable with fine which may extend to fifty rupees
  
  for every such letter.
  (2) Whoever, having
  
  already been convicted of an offence under this section, is again convicted
  
  thereunder, shall, on every such subsequent conviction, be punishable with fine
  
  which may extend to five hundred rupees.