1. Chapter 22 Simple Mail Transfer Protocol (SMTP)

3. Figure 22-1 SMTP concept

4. Figure 22-2 UAs and MTAs

5. Figure 22-3 Relay MTAs

6. Figure 22-4 Mail gateway

7. USER AGENT (UA) 22.1

8. Figure 22-5 Format

9. ADDRESSES 22.2

10. Figure 22-6 Address

11. DELAYED DELIVERY 22.3

12. Figure 22-7 Sender-site delay

13. Figure 22-8 Receiver-site delay

14. ALIASES 22.4

15. Figure 22-9 Alias expansion

16. Figure 22-10 One-to-many expansion

17. Figure 22-11 Many-to-one expansion

18. MAIL TRANSFER AGENT 22.5

19. Figure 22-12 Email system

20. COMMANDS AND RESPONSES 22.6

21. Figure 22-13 Commands and responses

22. Figure 22-14 Command format

23. MAIL TRANSFER PHASES 22.7

24. Figure 22-15 Connection establishment

25. Figure 22-16 Message transfer

26. Figure 22-17 Connection termination

27. MULTIPURPOSE INTERNET MAIL EXTENSIONS (MIME) 22.8

28. Figure 22-18 MIME

29. Figure 22-19 MIME header

30. Figure 22-20 Base64

31. Figure 22-21 Quoted-printable

32. MAIL DELIVERY 22.9

33. Figure 22-22 Email delivery

34. MAIL ACCESS PROTOCOLS 22.10

35. Figure 22-22 POP3