somehow my yahoo address is being used to send spam to email address's I have sent mails to before, although nothing is in the sent box. I have scanned for trojans etc and a few were then deleted, but the problem persists with people emailing back that I have not contacted and many could not deliver messages in my in box. Looking up the ip address of the sender of the spam comes up with does not exist. How does this work and is there a way to stop it without deleting the account? I already changed the password