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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, specifically IMAP4rev1 (RFC 3501), to support UTF-8 encoded international characters in user names, mail addresses, and message headers. This specification replaces RFC 6855. This specification does not extend IMAP4rev2 (RFC 9051), since that protocol includes everything in this extension.

Document record

Document ID
RFC9755
Published
March 2025
Authors
P. Resnick; J. Yao; A. Gulbrandsen
Status
PROPOSED STANDARD
Stream
IETF
Area
art
Pages
11
Also known as
—
Obsoletes:
RFC 6855

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 →

Related documents

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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.

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canonical URL: /rfc/9755-imap-support-for-utf-8