The Citizens of India are required to obtain Immigration clearance both at the time of arrival as well as departure to/from India.
Indian Citizens are required to carry Valid Indian Passport, Valid Visa of the Destination Country and other clearances (if required) at the time of departure.
Passports of those Indian Citizens using e-Gates for their departure/ arrival to/ from India would not be stamped by Immigration. They may check their travel details from their Fast Track Immigration profile on FTI-TTP Website