Not only that, but I reported a similar one to yahoo recently, and included the header, etc...
They write back "sorry, it didn't originate from Yahoo; someone had spoofed them to make it appear to have originated from yahoo!!!!!"
Be afraid, be very afraid

I've got an idea...let's all give up on email and get ourselves carrier pigeons. Aside from their having flown in the wrong direction on D-Day, I've never known a pigeon to spoof, spam, or otherwise try and rip me off! (the decorations they leave on my car are an entirely different matter though
M