You're probably not looking for an explanation from me, but the notion of internet privacy is a stretch. I have an email address through a professional association. I have any incoming emails automatically forwarded to my main email account. I have never sent an email from that address. I have never given that email to anyone. The association has never given out that email address. I've never used that address to register for anything. I never log in to check the email at that address. Still, everyday I receive emails at that address that are then forwarded to me. Frequently I will receive two identical emails in my in box; one to my main address and one forwarded from the mystery email address.