That's interesting Fendi, I have never heard of this. Do you think its just for corporations and not small or solely owned ones? The reason I ask is that I have signed up to many autoresponders since the CAN-SPAM act was invoked, and I have never once seen a physical address in any of them. Besides, I don't see how that would really help. Those who are spamming can just make up a fake address, and those who are truly in legitimate business have their address all over the world, opening the door up for loads of trouble.