yes but it gets to a point where they cant do anything as there email gateway is overloaded with incoming mail and in most cases their email server or client cant do a thing let alone process a rule and send it back to a dummy address (ghostmail).
BT now limit one of my accounts to sending 500 emails a minute. because of the said incident. but its only on one of their smtp servers. nd I have acounts with about 6 isp's as well as direct access to a backbone access netowrk through work. 600mb STM4 anybody !!!.