El Reg (http://www.theregister.co.uk/2007/06/28/outlook_bug_isnot/) is reporting a potentially dangerous email, purportedly from Microsoft. "Do not be tempted into opening an email with the subject line: "Microsoft Security Bulletin MS07-0065" because it is no such thing."
If recipients click on the link in the email, they are not taken to Microsoft's website but one of many compromised websites hosting a Trojan horse.