1 \chapter*{Requests for Comments}

2

3 \name{Requests for Comments} are the documents that propose or define Internet standards and best practices. They are controlled by the \name{Internet Engineering Task Force} (short: \NAME{IETF}) \citeweb{ietf:homepage}.

4 \index{ietf}

5

6 A particular \RFC\ is located at {\small\url{http://tools.ietf.org/rfc/rfcNNNN.txt}}\,, where ``\texttt{NNNN}'' is the four-digit number of that \RFC. For example is \RFC\,821 located at {\small\url{http://tools.ietf.org/rfc/rfc0821.txt}}\,.

7 \index{rfc}

8

9 More comfortable to browse are the \NAME{HTML} formatted representations which contain navigation hyperlinks. They are accessible at {\small\url{http://tools.ietf.org/html/rfcNNNN}}\,.

10

11 Following is a list of \RFC{}s which are relevant for this thesis. An extensive list of mail-related \RFC{}s is available at \citeweb{imc:mail-rfcs}.

12

13 \begin{description}

14 \item[\RFC\,821] \emph{Simple Mail Transfer Protocol} \obsoleted{2821}

15 \item[\RFC\,822] \emph{Standard for the format of \NAME{ARPA} Internet text messages} \obsoleted{2822}

16 \item[\RFC\,2487] \emph{\SMTP\ Service Extension for Secure \SMTP\ over \NAME{TLS}} \obsoleted{3207}

17 \item[\RFC\,2505] \emph{Anti-Spam Recommendations for \SMTP\ \MTA{}s}

18 \item[\RFC\,2554] \emph{\SMTP\ Service Extension for Authentication} \obsoleted{4954}

19 \item[\RFC\,2821] \emph{Simple Mail Transfer Protocol} \obsoleted{5321}

20 \item[\RFC\,2822] \emph{Internet Message Format} \obsoleted{5322}

21 \item[\RFC\,3207] \emph{\SMTP\ Service Extension for Secure \SMTP\ over Transport Layer Security}

22 \item[\RFC\,4954] \emph{\SMTP\ Service Extension for Authentication}

23 \item[\RFC\,5321] \emph{Simple Mail Transfer Protocol}

24 \item[\RFC\,5322] \emph{Internet Message Format}

25 \end{description}

26

27 \index{smtp}

28 \index{mail message}

29 \index{smtps}

30 \index{spam}

31 \index{auth!smtp-auth}

32 \index{starttls}

33