IMAP4 Multimailbox SEARCH Extension
draft-ietf-appsawg-multimailbox-search-01

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Document Type Active Internet-Draft (appsawg WG)
Last updated 2014-07-21 (latest revision 2014-06-03)
Stream IETF
Intended RFC status Proposed Standard
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Stream WG state Submitted to IESG for Publication (wg milestone: May 2014 - Publication requeste... )
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Send notices to appsawg-chairs@tools.ietf.org, draft-ietf-appsawg-multimailbox-search@tools.ietf.org
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Applications Area Working Group                                 B. Leiba
Internet-Draft                                       Huawei Technologies
Obsoletes: 6237 (if approved)                                A. Melnikov
Updates: 4466 (if approved)                                Isode Limited
Intended status: Standards Track                            June 3, 2014
Expires: December 5, 2014

                  IMAP4 Multimailbox SEARCH Extension
               draft-ietf-appsawg-multimailbox-search-01

Abstract

   The IMAP4 specification allows the searching of only the selected
   mailbox.  A user often wants to search multiple mailboxes, and a
   client that wishes to support this must issue a series of SELECT and
   SEARCH commands, waiting for each to complete before moving on to the
   next.  This extension allows a client to search multiple mailboxes
   with one command, limiting round trips delay, and not requiring
   disruption of the currently selected mailbox.  This extension also
   uses MAILBOX and TAG fields in ESEARCH responses, allowing a client
   to pipeline the searches if it chooses.  This document updates RFC
   4466 and obsoletes RFC 6237.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
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   This Internet-Draft will expire on December 5, 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

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   (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.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   1.1.  Conventions Used in This Document . . . . . . . . . . . . .   3
   2.  New ESEARCH Command . . . . . . . . . . . . . . . . . . . . .   3
   2.1.  The ESEARCH Response  . . . . . . . . . . . . . . . . . . .   4
   2.2.  Source Options: Specifying Mailboxes to Search  . . . . . .   5
   2.3.  Strictness in Search Matches  . . . . . . . . . . . . . . .   7
   3.  Examples  . . . . . . . . . . . . . . . . . . . . . . . . . .   7
   4.  Formal Syntax . . . . . . . . . . . . . . . . . . . . . . . .   7
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .   9
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   9
   7.  Implementation Status . . . . . . . . . . . . . . . . . . . .   9
   8.  Changes Since RFC 6237  . . . . . . . . . . . . . . . . . . .  10
   9.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  10
   10. References  . . . . . . . . . . . . . . . . . . . . . . . . .  11
   10.1.  Normative References . . . . . . . . . . . . . . . . . . .  11
   10.2.  Informative References . . . . . . . . . . . . . . . . . .  11
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  11

1.  Introduction

   The IMAP4 specification allows the searching of only the selected
   mailbox.  A user often wants to search multiple mailboxes, and a
   client that wishes to support this must issue a series of SELECT and
   SEARCH commands, waiting for each to complete before moving on to the
   next.  The commands can't be pipelined, because the server might run
   them in parallel, and the untagged SEARCH responses could not then be
   distinguished from each other.

   This extension allows a client to search multiple mailboxes with one
   command, and includes MAILBOX and TAG fields in the ESEARCH response,
   yielding the following advantages:

   o  A single command limits the number of round trips needed to search
      a set of mailboxes.

   o  A single command eliminates the need to wait for one search to
      complete before starting the next.

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