RFC 9051
Internet Message Access Protocol (IMAP) - Version
4rev2
Abstract
The Internet Message Access Protocol Version 4rev2 (IMAP4rev2) allows a client to access and
manipulate electronic mail messages on a server. IMAP4rev2 permits manipulation of mailboxes
(remote message folders) in a way that is functionally equivalent to local folders. IMAP4rev2 also
provides the capability for an offline client to resynchronize with the server.
IMAP4rev2 includes operations for creating, deleting, and renaming mailboxes; checking for new
messages; removing messages permanently; setting and clearing flags; parsing per RFCs 5322,
2045, and 2231; searching; and selective fetching of message attributes, texts, and portions
thereof. Messages in IMAP4rev2 are accessed by the use of numbers. These numbers are either
message sequence numbers or unique identifiers.
IMAP4rev2 does not specify a means of posting mail; this function is handled by a mail
submission protocol such as the one specified in RFC 6409.
Stream: Internet Engineering Task Force (IETF)
RFC: 9051
Obsoletes: 3501
Category: Standards Track
Published: August 2021
ISSN: 2070-1721
Authors: A. Melnikov, Ed.
Isode Ltd
B. Leiba, Ed.
Futurewei Technologies
Status of This Memo
This is an Internet Standards Track document.
This document is a product of the Internet Engineering Task Force (IETF). It represents the
consensus of the IETF community. It has received public review and has been approved for
publication by the Internet Engineering Steering Group (IESG). Further information on Internet
Standards is available in Section 2 of RFC 7841.
Information about the current status of this document, any errata, and how to provide feedback
on it may be obtained at .
https://www.rfc-editor.org/info/rfc9051
Melnikov & Leiba Standards Track Page 1
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