…atus Email expansions History Document Type RFC - Experimental (September 2008) Errata Obsoleted by RFC 6531 Updates RFC 2821 RFC 4952 RFC 2822 Was draft-ietf-eai-smtpext eai WG Authors Jiankang Yao Wei MAO 2020-01-21 RFC stream Internet Engineering Task Force (IETF) Formats txt …

…FC - Experimental Document Document type RFC - Experimental September 2008 View errata Report errata Obsoleted by RFC 6532 Updates RFC 2822 RFC 2045 Was draft-ietf-eai-utf8headers eai WG Select version 12 RFC 5335 Compare versions Author Abel Yang Email authors RFC stream Other f…

…tion 2 of RFC 5741 . Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at http://www.rfc-editor.org/info/rfc5891 . Klensin Standards Track [Page 1] RFC 5891 IDNA2008 Protocol August 2010 Copyright Notice Copyright…