An electronic smoking article is disclosed, which includes an outer housing extending in a longitudinal direction； a micro pump system configured to pump a liquid material contained within a liquid supply reservoir through an outlet of the supply reservoir into a capillary； the capillary having an inlet and an outlet, the inlet in communication with the outlet of the liquid supply reservoir； a heating arrangement operable to heat the capillary to a temperature sufficient to at least initially volatilize the liquid material contained within the capillary； a power supply operable to apply voltage to the micro pump gas cell to generate a gas to drive the liquid material out of the liquid supply reservoir into the inlet of the capillary； at least one air inlet； and whereby air is mixed with the volatilized material to form an aerosol.
