metasystema.org
ObsoletedEXPERIMENTALIETF stream

RFC 5738: IMAP Support for UTF-8

This RFC has been replaced. Do not implement against it for new work — it was formally obsoleted by RFC 6855.

Current document in this lineage: RFC 9755 — IMAP Support for UTF-8

In plain English — editorial summary, not part of the RFC

This specification extends the Internet Message Access Protocol version 4rev1 (IMAP4rev1) to support UTF-8 encoded international characters in user names, mail addresses, and message headers. This document defines an Experimental Protocol for the Internet community.

Document record

Document ID
RFC5738
Published
March 2010
Authors
P. Resnick; C. Newman
Status
EXPERIMENTAL
Stream
IETF
Area
app
Pages
15
Also known as
—
Obsoleted by:
RFC 6855
Updates:
RFC 3501

Topics

Standards lineage

This document is one revision in a chain of 3 RFCs, each formally replacing the one before it.

  1. RFC 5738 (2010)
  2. RFC 6855 (2013)
  3. RFC 9755 (2025) ✓

Read the full history of IMAP Support for UTF-8 →

Referenced by

One later RFC formally updates or obsoletes part of this document.

Related documents

Ranked automatically by shared keywords, IETF area and stream — not by editorial selection.

Also filed under

About this page

The document record above — title, authors, date, status, stream, area, relationships, DOI and errata — is imported verbatim from the public RFC Editor index. The “in plain English” section is editorial: written by The metasystema editorial team, not part of the RFC. Where the two differ, the RFC text governs.

Last checked against the RFC Editor index on . RFCs are never revised after publication; changes are issued as new documents.

Data sources · Editorial policy · Report a correction · What is an RFC?

canonical URL: /rfc/5738-imap-support-for-utf-8