Abstract: A mailbox post assembly includes a lower post having an upper surface, and an upper post having a lower surface. A flexible member is securably interposed between the upper surface of the lower post and lower surface of the upper post. The flexible member is configured to allow the upper post to flex relative to the lower post. Preferably, the flexible member is part of a flex assembly further including a lower post mounting bracket, an upper post mounting bracket, and a shear washer. The flex assembly is preferably covered with a snow and ice shield.