Sendmail

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Reliable, flexible, and configurable, sendmail has long been a staple for mail routing, yet its complexity remains daunting even for seasoned system administrators. To navigate its intricacies, sendmail users have consistently turned to a trusted resource — the bat book — now in its third edition. This bestselling reference has been thoroughly revised to cover sendmail 8.12, which introduces more features and significant changes than any prior version of the Unix-based email routing program. Given these differences, a comprehensive rewrite was essential. The book starts with guidance on building and installing sendmail and its essential companion programs, such as vacation and makemap. Following this, it addresses day-to-day administration, featuring two new chapters: "Performance Tuning" for optimizing mail delivery efficiency and "Handling Spam," which explores sendmail's robust anti-spam capabilities. The configuration file and debugging processes are also covered in detail. Additionally, five appendices provide extensive insights into sendmail. With dozens of new features, options, and macros introduced in versions 8.10 through 8.12, this expanded edition thoroughly addresses each aspect. Armed with this resource, you will be equipped to configure sendmail to meet your system's needs. This anticipated revision is essential for all sendmail administrators.