IIT Delhi became India’s first ‘Gen Z’ post office last year in December. (Express Photo: Reva Thakkar) IIT Delhi became India’s first ‘Gen Z’ post office last year in December. The names of the IIT Delhi students who painted it are written in red paint in the corner of the wall. There is also a framed picture showing the post office as it used to look next to how it looks now. Why a ‘Gen Z post office’?