Hello,

Our SPAM filters caught a potentially dangerous email announcing a critical patch for Outlook and Outlook express. The message appears to come from Microsoft Customer Support (no-reply@microsoft.com) but a quick look at the header information (or even hovering over the embedded link) will tell you that it’s not from Microsoft.

Do NOT install this update.

While this is a particularly good job of spoofing – the grammar is correct and doesn’t appear to have been run through Babel Fish – this is not from Microsoft. Here’s an excerpt from the original message:

Update for Microsoft Outlook / Outlook Express (KB910721)
Brief Description
Microsoft has released an update for Microsoft Outlook / Outlook Express. This update is critical and provides you with the latest version of the Microsoft Outlook / Outlook Express and offers the highest levels of stability and security. 

Microsoft recommends that all patches should be downloaded from the Microsoft Windows Update site. Go to http://update.microsoft.com (best to type this in directly) and the site will let you know if you need any updates to applications or to your OS.

Thanks,
John