I have Windows XP installed on my computer. I have been getting frequent e-mail from an unknown source with no return address that states something to this effect: "Sorry to inform you but your e-mail to email@example.com (a fake domain) cannot be delivered. The e-mail is being returned to you." I never heard of the faked domain and I certainly never sent this e-mail. I think that I am being harassed by somebody but I don't know who. Does anyone else get this type of message? What can I do to stop this type of message? Thank you very much.