I have on several occasions had emails that looked like they were sent from me to everyone in my contact list subject of "dear friend". I did not send these nor authorize them. The content of the message talks about a discount electronics web site and gives a live link. I have not clicked on the link. This is getting embarrassing as it is going to a listserv for my professional association. Can someone help? I use a Mac with the Leopard operating system. I use yahoo for email and firefox for my browser. All are updated. Have run virus and spyware scans and no real results there.