Palkon Ki Chhaon Mein (1977)

Ravi (Rajesh Khanna) accidentally lands a job as postman in a remote village after being an unemployed college graduate for some Time. He meets a variety of people as he fits into rural life, including Mohini (Hema Malini). He mistakes her affection for love and falls for her, while she is still waiting for an Army officer with whom she had a fling with when his battalion was training near her village. Ravi withdraws into himself when he finds out about her fling and tries to help her locate her lover when war breaks out. However, he comes to know that Mohini's lover has been killed in action and has the unenviable job of giving her this news.