We’ve received feedback that many people want to be able to get important security and software release announcements without having to filter through the chef category or the posts on the Chef blog. There are now categories here for those posts so you can configure Discourse to email you about only the posts that you’re interested in. In your Discourse preferences under ‘Categories’ you can add categories to ‘Muted’ that you do not want to receive email notifications for. This allows you to easily get emails about new releases and security alerts, and still be able to participate in the Chef category without all of the posts coming to your email inbox.
Additional information about the change is in the announcement on the Chef blog: https://www.chef.io/blog/2016/03/29/moving-release-and-security-announcements-to-discourse/