Conclusion

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In this chapter you've learned how to inject new messages via SMTP and using the sendmail, qmail-inject, and qmail-queue commands—and why you might want to use one method or the other. You've also learned how to control the contents of messages injected using qmail-inject through the use of environment variables.

Then you learned how to handle incoming mail using dot-qmail files to deliver to mailboxes, to deliver to programs, or to forward messages to another address. You also learned how to use extension addresses to manage your e-mail address namespace. Finally, you learned about the utilities included with qmail for creating, reading, and processing mail.

In Chapter 5, "Managing qmail," you'll learn how to manage a qmail installation. We'll show you how to use the qmailctl script from Chapter 2, manage the queue, and use the mail administrator commands provided by qmail.

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