7. References

[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, March 1997.
[RFC3629] Yergeau, F., "UTF-8, a transformation format of ISO 10646", RFC 3629, November 2003.
[RFC5234] Crocker, D. and P. Overell, "Augmented BNF for Syntax Specifications: ABNF", STD 68, RFC 5234, January 2008.
[RFC5322] Resnick, P., Ed., "Internet Message Format", RFC 5322, October 2008.
[RFC6152] Klensin, J., Freed, N., Rose, M., and D. Crocker, "SMTP Service Extension for 8-bit MIME Transport", STD 71, RFC 6152, March 2011.

[RFC5335] Yang, A., Ed., "Internationalized Email Headers", RFC 5335, September 2008.
[RFC6530] Klensin, J. and Y. Ko, "Overview and Framework for Internationalized Email", RFC 6530, February 2012.

Authors' Addresses

Abel Yang TWNIC 4F-2, No. 2, Sec. 2, Jinshan S. Rd. Taipei 106 Taiwan

Shawn Steele Microsoft

Ned Freed Oracle 800 Royal Oaks Monrovia, CA 91016-6347 USA