A piston rod installed to a vehicle height adjusting shock absorber includes a body portion having a hollow portion with first and second ends that are open. The diffusing means has a central portion and a peripheral portion. At least engager is mounted to the distal portion of the body The engager is sized for movement through said passageway with the body. The test header allows a sender to test an e-mail address for validity without the message being forwarded to the user, as will be described below. The selected device-path includes at least one device of each location of the series of locations.