You can now receive an e-mail notification once your favorite category or subcategory has a new post. This will allow you to know when a person posts something in a favorite category you follow, like a specific club, etc. You can favorite a category by clicking on the heart or star symbol.
Note: If you don't want to receive e-mails for category updates you are following, just uncheck this in your Profile (click on username -> Edit My Profile) listed under mailings.