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Status:

PROPOSED STANDARD

Author:

K. Fujiwara

Stream:

IETF

Source:

eai (app)

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DOI:  https://doi.org/10.17487/RFC6857

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Abstract

The Email Address Internationalization (SMTPUTF8) extension to SMTPallows Unicode characters encoded in UTF-8 and outside the ASCIIrepertoire in mail header fields. Upgraded POP and IMAP serverssupport internationalized messages. If a POP or IMAP client does notsupport Email Address Internationalization, a POP or IMAP servercannot deliver internationalized messages to the client and cannotremove the message. To avoid that situation, this document describesa mechanism for converting internationalized messages into thetraditional message format. As part of the conversion process,message elements that require internationalized treatment are recodedor removed, and receivers are able to recognize that they receivedmessages containing such elements, even if they cannot process theinternationalized elements.

For the definition ofStatus,seeRFC 2026.

For the definition ofStream, seeRFC 8729.