I am new to all of this and do not know a THING about hackers, crackers, coding, etc. I have a suspicion though that I have been hacked in my yahoo e-mail account.I received an e-mail with no sender and no message. I tried to reply back to it and was unable. How can an e-mail be from "no one?" In the sender part it was just blank. How can there be no sender? That would bean advertiser's dream if you could do that -- everyone would open it up, right? This seems strange -- any thoughts you guys? Thanks.