"Downgrading mechanism for Email Address Internationalization", Kazunori Fujiwara, Yoshiro Yoneya, 16-Sep-08. ( bytes)

Traditional mail systems handle only ASCII characters in SMTP envelope and mail header fields. The Email Address Internationalization (UTF8SMTP) extension allows UTF-8 characters in SMTP envelope and mail header fields. To avoid rejecting internationalized Email messages when a server in the delivery path does not support the UTF8SMTP extension, some sort of converting mechanism is required. This document describes a downgrading mechanism for Email Address Internationalization. Note that this is a way to downgrade, not tunnel. There is no associated up-conversion mechanism, although internationalized email clients might use original internationalized addresses or other data when displaying or replying to downgraded messages.

"IMAP Support for UTF-8", Pete Resnick, Chris Newman, 3-Nov-08. ( bytes)

This specification extends the Internet Message Access Protocol version 4rev1 (IMAP4rev1) to support unencoded international characters in user names, mail addresses and message headers. This is an early draft and intended as a framework for discussion. Please do not deploy implementations of this draft.

"Mailing Lists and Internationalized Email Addresses", Randall Gellens, 20-Nov-08. ( bytes)

This document describes considerations for mailing lists with the introduction of internationalized email addresses. This document makes some specific recommendations on how mailing lists should act in various situations.

"POP3 Support for UTF-8", Chris Newman, Randall Gellens, 20-Nov-08. ( bytes)

This specification extends the Post Office Protocol version 3 (POP3) to support un-encoded international characters in user names, passwords, mail addresses, message headers, and protocol-level textual error strings.

"Displaying Downgraded Messages for Email Address Internationalization", Kazunori Fujiwara, 16-Oct-08. ( bytes)

This document describes how to display downgraded messages which originally contain internationalized E-mail addresses or internationalized header fields.

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