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Chapter 1, "Introducing qmail," describes qmail and its features. Read it if you're not sure exactly what qmail is or what it can do for you. It also describes the overall organization of the qmail suite, compares qmail to other Unix mailers, and lists other sources of qmail information and support.
Chapter 2, "Installing qmail," describes step-by-step the installation of qmail on a wide range of operating system distributions, including commercial Unix variants, Linux, and various Berkeley Software Distributions (BSDs).
Chapter 3, "Configuring qmail: The Basics," shows how to configure qmail for a variety of basic functions.
Chapter 4, "Using qmail," covers how users read and send messages.
Chapter 5," Managing qmail," covers the qmailctl script, queue management, and administrative commands.
Chapter 6, "Troubleshooting qmail," shows how to monitor the qmail processes, understand the log files, analyze message headers, conduct tests, and diagnose common problems.
Chapter 7, "Configuring qmail: Advanced Options," shows how to configure qmail for a variety of typical configurations, migrate Sendmail systems to qmail, and use source-code modifications. It also shows how to use the QMTP and QMQP protocols, enable secure networking, and improve the performance of your qmail system.
Chapter 8, "Controlling Junk Mail," covers methods for dealing with unwanted mail at both the system and user levels.
Chapter 9, "Managing Mailing Lists," details installing and using three popular mailing list managers with qmail: ezmlm, Majordomo, and Mailman.
Chapter 10, "Serving Mailboxes," shows how to provide remote access to users' mailboxes via the POP3 and IMAP protocols.
Chapter 11, "Hosting Virtual Domains and Users," covers two popular qmail add-ons for managing virtual domains and virtual users: VmailMgr and Vpopmail.
Chapter 12, "Understanding Advanced Topics," explains from a qmail perspective some advanced topics such as scalable server "farms," accessing user information via LDAP or SQL, and the Variable Envelope Return Path (VERP) mechanism that qmail uses for reliable automatic bounce handling.
The appendices cover:
How qmail works
Related packages
How Internet mail works
qmail's features
Error messages
Gotchas
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