I think there is a bug on NIS 2012 version 19.7.0.9 cause the Anti Spam not function in Microsoft Outlook 2010, even the toolbar has appeared but the Anti Spam cannot recognized the mail as spam after this email has clasified as spam by user and in the Email Header didn't shown text "X-BRIGHT MAIL as usual when scanning the incoming mail.
Please check and investigate it....
Tks & B/regards,