Microsoft has recently released the December update for the Outlook 2007/2010 Junk E-mail Filter.

"This update provides the Junk E-mail Filter in Microsoft Office Outlook with a more current definition of which e-mail messages should be considered junk e-mail."

The update is available for Outlook 2007 and Outlook 2010 (32-bit, 64-bit) or you can use Microsoft Update. As usual the update comes with the corresponding Knowledge Base article:

1. Update for Microsoft Office Outlook 2007 Junk Email Filter (KB2483110)
2. Description of the Outlook 2010 Junk Email Filter update: January 11, 2011

Kind Regards,

Catastrophic Failure