Chapter 5. DNS and Electronic Mail

"And here Alice began to get rather sleepy, and went on saying to herself, in a dreamy sort of way, "Do cats eat bats? Do cats eat bats?" and sometimes "Do bats eat cats?" for, you see, as she couldn't answer either question, it didn't much matter which way she put it."

I'll bet you're drowsy too, after that looong chapter. Thankfully, this next chapter discusses a topic that will probably be very interesting to you system administrators and postmasters: how DNS affects electronic mail. And even if it isn't interesting to you, at least it's shorter than the last chapter.