*India Post Passenger Reservation System (PRS):*

In order to provide Railway Tickets at the doorstep of the public, Railway Reservation Tickets of all classes are booked at select Post Offices.

To provide Railway tickets through convenient locations,Railway reservation tickets for all classes are being sold at selected Post Offices in association with the Ministry Of Railways(MOR).The service is being provided in those areas where there is no Rail head/Railway counters.The service is presently made available at 333 Post Offices across India specially in rural and semi rural areas.

https://www.indiapost.gov.in/MBE/Pages/Content/IPPRS.aspx