Can anyone recommend a good spam filter for Outlook?
Since Outlook 2003, spam filter is built-in to Microsoft Outlook. http://office.microsoft.com/en-us/outlook/HA011590551033.aspx Try to enable this feature before trying third party product to determine if number of spam messages received reduced. There are number of settings from No Automatic Filtering to Safe lists Only (only e-mail on your list are allowed to be delivered in the Mailbox).