page-50

   [KEYWORDS] Bradner, S., "Key words for use in RFCs to Indicate
              Requirement Levels", BCP 14, RFC 2119, March 1997,
              <http://www.rfc-editor.org/info/rfc2119>.

   [MAIL]     Resnick, P., Ed., "Internet Message Format", RFC 5322,
              October 2008, <http://www.rfc-editor.org/info/rfc5322>.

   [MIME]     Freed, N. and N. Borenstein, "Multipurpose Internet Mail
              Extensions (MIME) Part One: Format of Internet Message
              Bodies", RFC 2045, November 1996,
              <http://www.rfc-editor.org/info/rfc2045>.

   [SEC-TERMS]
              Shirey, R., "Internet Security Glossary, Version 2",
              FYI 36, RFC 4949, August 2007,
              <http://www.rfc-editor.org/info/rfc4949>.

   [SMTP]     Klensin, J., "Simple Mail Transfer Protocol", RFC 5321,
              October 2008, <http://www.rfc-editor.org/info/rfc5321>.

   [SPF]      Kitterman, S., "Sender Policy Framework (SPF) for
              Authorizing Use of Domains in Email, Version 1", RFC 7208,
              April 2014, <http://www.rfc-editor.org/info/rfc7208>.

   [URI]      Berners-Lee, T., Fielding, R., and L. Masinter, "Uniform
              Resource Identifier (URI): Generic Syntax", STD 66,
              RFC 3986, January 2005,
              <http://www.rfc-editor.org/info/rfc3986>.

   [KEYWORDS] Bradner, S., "Key words for use in RFCs to Indicate
              Requirement Levels", BCP 14, RFC 2119, March 1997,
              <http://www.rfc-editor.org/info/rfc2119>.

   [MAIL]     Resnick, P., Ed., "Internet Message Format", RFC 5322,
              October 2008, <http://www.rfc-editor.org/info/rfc5322>.

   [MIME]     Freed, N. and N. Borenstein, "Multipurpose Internet Mail
              Extensions (MIME) Part One: Format of Internet Message
              Bodies", RFC 2045, November 1996,
              <http://www.rfc-editor.org/info/rfc2045>.

   [SEC-TERMS]
              Shirey, R., "Internet Security Glossary, Version 2",
              FYI 36, RFC 4949, August 2007,
              <http://www.rfc-editor.org/info/rfc4949>.

   [SMTP]     Klensin, J., "Simple Mail Transfer Protocol", RFC 5321,
              October 2008, <http://www.rfc-editor.org/info/rfc5321>.

   [SPF]      Kitterman, S., "Sender Policy Framework (SPF) for
              Authorizing Use of Domains in Email, Version 1", RFC 7208,
              April 2014, <http://www.rfc-editor.org/info/rfc7208>.

   [URI]      Berners-Lee, T., Fielding, R., and L. Masinter, "Uniform
              Resource Identifier (URI): Generic Syntax", STD 66,
              RFC 3986, January 2005,
              <http://www.rfc-editor.org/info/rfc3986>.

13.2. Informative References

   [ADSP]     Allman, E., Fenton, J., Delany, M., and J. Levine,
              "DomainKeys Identified Mail (DKIM) Author Domain Signing
              Practices (ADSP)", RFC 5617, August 2009,
              <http://www.rfc-editor.org/info/rfc5617>.

   [ARF]      Shafranovich, Y., Levine, J., and M. Kucherawy, "An
              Extensible Format for Email Feedback Reports", RFC 5965,
              August 2010, <http://www.rfc-editor.org/info/rfc5965>.

   [AUTH-RESULTS]
              Kucherawy, M., "Message Header Field for Indicating
              Message Authentication Status", RFC 7001, September 2013,
              <http://www.rfc-editor.org/info/rfc7001>.

13.2. 情報としての参照資料

   [ADSP]     Allman, E., Fenton, J., Delany, M., and J. Levine,
              "DomainKeys Identified Mail (DKIM) Author Domain Signing
              Practices (ADSP)", RFC 5617, August 2009,
              <http://www.rfc-editor.org/info/rfc5617>.

   [ARF]      Shafranovich, Y., Levine, J., and M. Kucherawy, "An
              Extensible Format for Email Feedback Reports", RFC 5965,
              August 2010, <http://www.rfc-editor.org/info/rfc5965>.

   [AUTH-RESULTS]
              Kucherawy, M., "Message Header Field for Indicating
              Message Authentication Status", RFC 7001, September 2013,
              <http://www.rfc-editor.org/info/rfc7001>.

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