Essential System Administration, Third Edition

Making sure that electronic mail gets sent out and delivered is one of the system administrator's most importantjobs, and it's also one that becomes extremely visible should things go wrong. Administering email is inevitably time-consuming and frustrating, at least intermittently. It also is comprised of a set of tasks that can seem rather daunting to the newcomer. However, don't let any initial feelings of confusion discourage or overwhelm you; in a surprisingly short time, you'll be in control and complaining with the best of them about the mail system's eccentricities and shortcomings.