[Postini Admin Console] Postini email filters [Google Admin Console] 
Google Apps email settings For general instructions on how to navigate to your Google Apps email settings, and for an overview of the email settings that are available in Google Apps, see Configure advanced settings for Gmail. Note that you’ll need to click Gmail (rather than "Email") in the Google Admin console to access your email settings. See the sections below for details regarding specific settings, such as Content compliance or Attachment compliance. See also Guidelines for configuring advanced settings for Gmail.