The invention relates to a method for preparing a beverage through a capsule inserted in a beverage machine; the capsule comprising an enclosure containing one or more beverage ingredients, wherein a brewing fluid is introduced in the enclosure to brew the one or more beverage ingredients, characterized in that: a discharge wall is placed in association with the enclosure, wherein the discharge wall comprises a discharge member that restrains the brewed liquid from being discharged from the capsule or limits the liquid flow in case the pressure inside the enclosure is below a predetermined value, and the discharge member enables the delivery of the brewed liquid in case the pressure exceeds the predetermined value.