Consider the Indian Postal Services as a business firm. One of the competitive advantages of the Indian Postal Services is its tremendous nationwide reach and collaboration with the national postal services of other countries. In addition to mailing and telegram services, the Indian Postal Services also delivers banking services to rural and underserved populations. With respect to these services and other new offerings, 

discuss how Blockchain technology could help the Indian Postal Services in a. Improving existing services b. Creating new service models, etc. 

How would blockchain technology help? Make appropriate assumptions.