Conclusion

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In this chapter you learned how to set up qmail in a variety of standard configurations including backup MX, smart host, and null client. You also examined the issues involved in migrating a Sendmail system to qmail: aliases, .forward files, and mailbox location. You also learned how to apply source-code patches and what some of the common patches provide.

Next, you learned about two protocols introduced with qmail, QMTP and QMQP, and you learned what they do and how to use them. You also learned how to secure your SMTP service for reliable relay control and privacy. Finally, you learned how to improve the performance of your qmail server by reconfiguring it, upgrading the hardware, and improving its networking.

In Chapter 8, "Controlling Junk Mail," you'll learn how to control junk mail by blocking it, filtering it, and by keeping your addresses out of their databases.

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