1. Introduction to Qmail

   1. Chapter 1 Internet Email

      1. Mail Basics
      2. Mailstore
      3. The Structure of Internet Mail

   2. Chapter 2 How Qmail Works

      1. Small Programs Work Together
      2. What Does a Mail Transfer Agent (MTA) Do?
      3. The Pieces of Qmail

   3. Chapter 3 Installing Qmail

      1. Where to Find Qmail
      2. Creating the Users and Groups
      3. Configuring and Making the Software
      4. Patching Qmail

   4. Chapter 4 Getting Comfortable with Qmail

      1. Mailboxes, Local Delivery, and Logging
      2. An Excursion into Daemon Management
      3. Setting Up the Qmail Configuration Files
      4. Starting and Stopping Qmail
      5. Incoming Mail
      6. Procmail and Qmail
      7. Creating Addresses and Mailboxes
      8. Reading Your Mail
      9. Configuring Qmail's Control Files
      10. Using ~alias
      11. fastforward and /etc/aliases

   5. Chapter 5 Moving from Sendmail to Qmail

      1. Running Sendmail and Qmail in Parallel
      2. User Issues
      3. System Issues
      4. Converting Your Aliases File
      5. Trusted Users

   6. Chapter 6 Handling Locally Generated Mail

      1. qmail-queue
      2. Cleaning Up Injected Mail
      3. Accepting Local Mail from Other Hosts
      4. Distinguishing Injected from Relayed Mail

   7. Chapter 7 Accepting Mail from Other Hosts

      1. Accepting Incoming SMTP Mail
      2. Accepting and Cleaning Up Local Mail Using the Regular SMTP Daemon
      3. Dealing with Roaming Users
      4. SMTP Authorization and TLS Security
      5. POP-before-SMTP

   8. Chapter 8 Delivering and Routing Local Mail

      1. Mail to Local Login Users
      2. Mail Sorting

   9. Chapter 9 Filtering and Rejecting Spam and Viruses

      1. Filtering Criteria
      2. Places to Filter
      3. Spam Filtering and Virus Filtering
      4. Connection-Time Filtering Tools
      5. SMTP-Time Filtering Tools
      6. Delivery Time Filtering Rules
      7. Combination Filtering Schemes

2. Advanced Qmail

   1. Chapter 10 Local Mail Delivery

      1. How Qmail Delivers Local Mail
      2. Mailbox Deliveries
      3. Program Deliveries
      4. Subaddresses
      5. Special Forwarding Features for Mailing Lists
      6. The Users Database
      7. Bounce Handling

   2. Chapter 11 Remote Mail Delivery

      1. Telling Local from Remote Mail
      2. qmail-remote
      3. Locating the Remote Mail Host
      4. Remote Mail Failures
      5. Serialmail

   3. Chapter 12 Virtual Domains

      1. How Virtual Domains Work
      2. Some Common Virtual Domain Setups
      3. Some Virtual Domain Details

   4. Chapter 13 POP and IMAP Servers and POP Toasters

      1. Each Program Does One Thing
      2. Starting the Pop Server
      3. Testing Your POP Server
      4. Building POP Toasters
      5. Picking Up Mail with IMAP and Web Mail

   5. Chapter 14 Mailing Lists

      1. Sending Mail to Lists
      2. Using Ezmlm with qmail
      3. Using Other List Managers with Qmail
      4. Sending Bulk Mail That's Not All the Same

   6. Chapter 15 The Users Database

      1. If There's No Users Database
      2. Making the Users File
      3. How Qmail Uses the Users Database
      4. Typical Users Setup
      5. Adding Entries for Special Purposes

   7. Chapter 16 Logging, Analysis, and Tuning

      1. What Qmail Logs
      2. Collecting and Analyzing Qmail Logs with Qmailanalog
      3. Analyzing Other Logs
      4. Tuning Qmail
      5. Tuning to Deal with Spam
      6. Looking at the Mail Queue with qmail-qread

   8. Chapter 17 Many Qmails Make Light Work

      1. Tools for Multiple Computers and Qmail
      2. Setting Up mini-qmail

   9. Chapter 18 A Compendium of Tips and Tricks

      1. Qmail Won't Compile
      2. Why Qmail Is Delivering Mail Very Slowly
      3. Stuck Daemons and Deliveries
      4. Mail to Valid Users Is Bouncing or Disappearing
      5. Mail Routing
      6. Local Mail Delivery Tricks
      7. Delivering Mail on Intermittent Connections
      8. Limiting Users' Mail Access
      9. Adding a Tag to Each Outgoing Message
      10. Logging All Mail
      11. Setting Mail Quotas and Deleting Stale Mail
      12. Backing Up and Restoring Your Mail Queue

   10. Appendix A A Sample Script

       1. A Mail-to-News Gateway

   11. Appendix B Online Qmail Resources

       1. Web Sites
       2. Mailing Lists

1. Colophon

Our look is the result of reader comments, our own experimentation, and feedback from distribution channels. Distinctive covers complement our distinctive approach to technical topics, breathing personality and life into potentially dry subjects. The animal on the cover of qmail is a tawny owl. Generally, it's dark brown and streaked with black and buff, but occasionally, it is grey. The tawny owl is the most common owl in Britain, and its distribution extends from Europe to North Africa and eastward to Iran and western Siberia. It is also found in India, southern China, Korea, and Taiwan.

The tawny owl does not built its own nest, rather it nests in natural holes and in the abandoned nests of crows, magpies, and even the nests of buzzards. It remains within its nesting territory all year round and pairbonds last for life. The female tawny owl will stay with her nestlings while the male gathers food. While the male hunts for rabbits, moles, mice, shrews, and other rodents, the female defends her territory passionately with threatening behavior and erratic flying. Occasionally, a human is attacked; in Britain, at least two people are known to have lost an eye, including Eric Hosking, the famous bird photographer.

The tawny owl is best known for its distinctive song. The normal song of the male owl announces territory, courtship, and food. The song begins with a drawn out hooo and then is followed by a pause before the male owl abruptly sings out ha, followed immediately by huhuhuhooo. Occasionally, the female tawny owl makes a similar hooting sound in response to the male's call. However, unlike the clear, resonant sound of the male song, the female's song possesses a wailing quality of wowowhooo. The duet that is performed between the two has led to a myriad of names for the tawny owl, including Billy hooter and Jenny howlet. Sarah Sherman was the production editor and the copyeditor for qmail. Genevieve d'Entremont was the proofreader. Reg Aubry and Mary Anne Weeks Mayo provided quality control. Tom Dinse wrote the index.

Emma Colby designed the cover of this book, based on a series design by Edie Freedman. The cover image is a 19th-century engraving from the Dover Pictorial Archive. Emma Colby produced the cover layout with QuarkXPress 4.1 using Adobe's ITC Garamond font.

David Futato designed the interior layout. This book was converted by Joe Wizda to FrameMaker 5.5.6 with a format conversion tool created by Erik Ray, Jason McIntosh, Neil Walls, and Mike Sierra that uses Perl and XML technologies. The text font is Linotype Birka; the heading font is Adobe Myriad Condensed; and the code font is LucasFont's TheSans Mono Condensed. The illustrations that appear in the book were produced by Robert Romano and Jessamyn Read using Macromedia FreeHand 9 and Adobe Photoshop 6. This colophon was written by Sarah Sherman.