Procmail Basics 12/06/2001 If you receive more than a few email messages a day, you've probably discovered that it becomes increasingly difficult to sort and prioritize your email. Messages you want to read immediately can get lost in a sea of less-important messages. Worse, your inbox can become cluttered with spam, virus-infected messages, and other disagreeables. Fortunately, the procmail program has been designed to help you sort through this mess.