law: Indian Post Office Act, 1898 
  3. Meanings of "in course of transmission by
  
  post" and "delivery"
  For the purposes of
  
  this Act- 
  (a) a postal article
  
  shall be deemed to be in course of transmission by post from the time of its
  
  being delivered to a post office to the time of its being delivered to the addressee
  
  or of its being returned to the sender or otherwise disposed of under Chapter
  
  VII;
  (b) the delivery of
  
  postal article of any description to a postman or other person authorized to
  
  receive postal articles of that description for the post shall be deemed to be
  
  a delivery to a post office; and
  (c) the delivery of
  
  postal article at the house or office of the addressee, or to the addressee or
  
  his servant or agent or other person considered to be authorized to receive the
  
  article according to the usual manner of delivering postal articles to the
  
  addressee, shall be deemed to be delivery to the addressee.