In this chapter, we have discovered some of the basics of Procmail. By now you should be familiar with the various files that Procmail uses to load recipes, the core principles of filtering, and the options available. We have also analyzed e-mails, set up individual and system wide filters, and looked at some of the simple testing, logging, and debugging options that will help us manage a company's mail more effectively.
We have just scratched the surface of what is possible, but hopefully this little taste has already provided you with a whole load of ideas about how you could go about processing and filtering your daily overload of e-mail. It may well have given you ideas for more advanced filters and the next chapter will provide more advice and explanations of how to go about setting these up.