I'm considering doing business with an overseas source. I made the contact with them based on information from a trusted friend. I received a request from them to join Yahoo Messenger with Voice to discuss matters. The thing that has me on edge is that the Yahoo request, which was legit, came with a "From" address that resolves to a forged Hotmail address.

I ran the full message through SpamCop and it says Yahoo was the source.

I looked up the IP address where the message originated and does come from the country it's supposed to come from.

I don't want to insult these guys by questioning their integrity, but something looks fishy. All I've got is a forged Hotmail address and a Yahoo address.

How easy is it to send a message from Yahoo and mung the "From" line?