E-mail is an important part of any Web site, and you need to plan its configuration carefully to make it a seamless part of the Web experience of your visitors. Without it, your Web site won't seem complete.
A fully functioning Web site is just the beginning. It needs to be maintained to reduce the risk of failure and monitored to help detect potential problems. Chapter 22, " Monitoring Server Performance", discusses many Linux-based tools that you can be use to track the health of your Linux server.