[masraum]

Yeah, like I said, I can send an email from an account and change the "from" field to say anything that I want. That is REALLY easy, childsplay. It's about 1000x easier than hacking someone's account and sending mail from their account. Spammers are more likely to find an email server that has unsecure access that allows folks to send emails without a username and password than they are to "hack" someone's account and send email through that account (although that does happen).

Someone got a hold of a list of emails and will use those addresses even if they don't have any access to the accounts of those emails. Now, there's not much that you can do to fix it I'm afraid.