IMAP Extensions: Quick Flag Changes Resynchronization (CONDSTORE) and Quick Mailbox Resynchronization (QRESYNC)
RFC 7162
Document | Type |
RFC - Proposed Standard
(May 2014; Errata)
Updates RFC 2683
|
|
---|---|---|---|
Authors | Alexey Melnikov , Dave Cridland | ||
Last updated | 2020-02-22 | ||
Replaces | draft-ietf-qresync-rfc4551bis, draft-melnikov-5162bis | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized with errata bibtex | ||
Reviews | |||
Stream | WG state | Submitted to IESG for Publication | |
Document shepherd | Eliot Lear | ||
Shepherd write-up | Show (last changed 2014-01-09) | ||
IESG | IESG state | RFC 7162 (Proposed Standard) | |
Consensus Boilerplate | Yes | ||
Telechat date | |||
Responsible AD | Barry Leiba | ||
Send notices to | (None) | ||
IANA | IANA review state | IANA OK - Actions Needed | |
IANA action state | RFC-Ed-Ack |
Internet Engineering Task Force (IETF) A. Melnikov Request for Comments: 7162 Isode Ltd Obsoletes: 4551, 5162 D. Cridland Updates: 2683 Surevine Ltd Category: Standards Track May 2014 ISSN: 2070-1721 IMAP Extensions: Quick Flag Changes Resynchronization (CONDSTORE) and Quick Mailbox Resynchronization (QRESYNC) Abstract Often, multiple IMAP (RFC 3501) clients need to coordinate changes to a common IMAP mailbox. Examples include different clients working on behalf of the same user and multiple users accessing shared mailboxes. These clients need a mechanism to efficiently synchronize state changes for messages within the mailbox. Initially defined in RFC 4551, the Conditional Store facility provides a protected update mechanism for message state information and a mechanism for requesting only changes to the message state. This memo updates that mechanism and obsoletes RFC 4551, based on operational experience. This document additionally updates another IMAP extension, Quick Resynchronization, which builds on the Conditional STORE extension to provide an IMAP client the ability to fully resynchronize a mailbox as part of the SELECT/EXAMINE command, without the need for additional server-side state or client round trips. Hence, this memo obsoletes RFC 5162. Finally, this document also updates the line-length recommendation in Section 3.2.1.5 of RFC 2683. 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 5741. Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at http://www.rfc-editor.org/info/rfc7162. Melnikov & Cridland Standards Track [Page 1] RFC 7162 IMAP CONDSTORE & QRESYNC May 2014 Copyright Notice Copyright (c) 2014 IETF Trust and the persons identified as the document authors. All rights reserved. This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (http://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. This document may contain material from IETF Documents or IETF Contributions published or made publicly available before November 10, 2008. The person(s) controlling the copyright in some of this material may not have granted the IETF Trust the right to allow modifications of such material outside the IETF Standards Process. Without obtaining an adequate license from the person(s) controlling the copyright in such materials, this document may not be modified outside the IETF Standards Process, and derivative works of it may not be created outside the IETF Standards Process, except to format it for publication as an RFC or to translate it into languages other than English. Melnikov & Cridland Standards Track [Page 2] RFC 7162 IMAP CONDSTORE & QRESYNC May 2014 Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 4 2. Requirements Notation . . . . . . . . . . . . . . . . . . . . 5 3. IMAP Protocol Changes . . . . . . . . . . . . . . . . . . . . 5 3.1. CONDSTORE Extension . . . . . . . . . . . . . . . . . . . 5 3.1.1. Advertising Support for CONDSTORE . . . . . . . . . . 8 3.1.2. New OK Untagged Responses for SELECT and EXAMINE . . 8 3.1.3. STORE and UID STORE Commands . . . . . . . . . . . . 10 3.1.4. FETCH and UID FETCH Commands . . . . . . . . . . . . 16 3.1.5. MODSEQ Search Criterion in SEARCH . . . . . . . . . . 19 3.1.6. Modified SEARCH Untagged Response . . . . . . . . . . 20 3.1.7. HIGHESTMODSEQ Status Data Items . . . . . . . . . . . 21 3.1.8. CONDSTORE Parameter to SELECT and EXAMINE . . . . . . 21 3.1.9. Interaction with IMAP SORT and THREAD Extensions . . 22 3.1.10. Interaction with IMAP ESORT and ESEARCH Extensions . 22Show full document text