Tell your friends.
As the US Computer Emergency Readiness Team (CERT) put is: “Use caution when opening attachments, even if they appear to have been sent by someone you know.” I have seen lots of reports recently of an American Airlines e-mail scam.
A version I have seen in my “consumer” free e-mail account junkmailbox looks like this:
Tips you can watch for:
For further info see Email and web scams: How to help protect yourself.