In the exchange, after bouncing on the ground, the ball can touch any other surface multiple times (except the ground). Thus, the door handle, the fences, the walls... everything is part of the field and reserves unexpected trajectories.
The second bounce on the ground scores the loss of the point for the receivers. Likewise, a ball that, after a first bounce on the ground, goes out of the crease. A ball that, after bouncing off a wall, returns to the striker's court also scores a point. On the other hand, after crossing the net, any ball that first touches a surface other than the ground is a "fault" for the sender.
Points are counted as in tennis (15, 30, 40, game, set, match).