How This Book Is Organized

Chapter 1, Understanding Mail Services provides an overview of the mail service. The concepts and terminology necessary to set up and maintain a mail service are discussed in detail.

Chapter 2, Setting Up and Administering Mail Services describes the steps required to set up and administer a mail service. Troubleshooting tips are included.

Chapter 3, Customizing sendmail Configuration Files explains how to edit the files that sendmail consults.

Appendix A, sendmail Configuration File includes a reference copy of the generic main.cf file.

Appendix B, sendmail Options lists the command-line arguments and the configuration options to sendmail, and the mailer flags.