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SMTPUTF8 Capability Indicator

Document type: Expired Internet-Draft (individual)
Document stream: No stream defined
Last updated: 2012-09-05 (latest revision 2012-03-04)
Intended RFC status: Unknown
Other versions: (expired, archived): plain text, pdf, html

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IESG State: Expired
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found here:


Key RFCs for internationalized email addresses specify the basic protocols for using them. The SMTP client can only know the SMTP server's ability by EHLO command. In order to help the internationalized email address delivery, this document suggests to add the new DNS RR type for internationalized email protocols. Through this RR type, the SMTP client can know whether the destination SMTP server can support the SMTPUTF8 ability before sending the EHLO command to the server.


Jiankang Yao <>
Sean Shen <>

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid)