I've yet to see such condensed into a single chapter unless you are giving a thumbnail "executive" brief.
Bob
What is a good way to learn about email systems? How mail moves thru the "system " (network). Whitelists, blacklists, ip's, email headers, solving delivery problems, tracing, pinging, etc etc etc.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic