Yahoo Email Address is being spoofed to send spam...

If they're not sent from the yahoo severs, you won't have any problems.

It is easy to fake someone's email, but if you look closely at the original email you'll see what server sent that email.

I wouldn't worry about it.

In my reading on this issue, I have come across a couple of people who had their yahoo email accounts closed because of complaints about the spam supposedly being sent from their account. Thats my worry=(