My email account has been used to send spam email... by an ip address that seems to be in China. The emails are being sent to my entire address book- not to strangers- but my internal yahoo address book. What can I do in this case? Is it a virus? I notice that most forums/websites about this issue suggest that it just "looks" like the emails are being sent by my email account because the spam tool fakes the sender's email address. It seems like a different issue if the emails are being sent to my entire address book... Please help. I am not sure where to start or what I can do about it.