IMAP $Important Keyword and \Important Special-Use Attribute
draft-ietf-extra-specialuse-important-02

Document Type Active Internet-Draft (extra WG)
Last updated 2018-04-19
Replaces draft-leiba-extra-specialuse-important
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Network Working Group                                      B. Leiba, Ed.
Internet-Draft                                       Huawei Technologies
Intended status: Standards Track                          April 19, 2018
Expires: October 19, 2018

      IMAP $Important Keyword and \Important Special-Use Attribute
                draft-ietf-extra-specialuse-important-02

Abstract

   RFC 6154 created an IMAP Special-Use LIST extension and defined an
   initial set of attributes.  This document defines a new attribute,
   "\Important", and establishes a new IANA registry for IMAP folder
   attributes, registering the attributes defined in RFCs 3348, 3501,
   and 6154.  This document also defines a new IMAP keyword,
   "$Important", and registers it in the registry defined in RFC 5788.

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 October 19, 2018.

Copyright Notice

   Copyright (c) 2018 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
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   provided without warranty as described in the Simplified BSD License.

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  2
   1.1.  Conventions used in this document  . . . . . . . . . . . . .  2

Leiba                   Expires October 19, 2018                [Page 1]
Internet-Draft   IMAP "Important" Keyword and Attribute       April 2018

   2.  Definition of the '$Important' Message Keyword . . . . . . . .  2
   3.  Definition of the 'Important' Mailbox Attribute  . . . . . . .  3
   3.1.  Formal Syntax  . . . . . . . . . . . . . . . . . . . . . . .  3
   3.2.  Examples . . . . . . . . . . . . . . . . . . . . . . . . . .  3
   3.2.1.  Example of a LIST Response . . . . . . . . . . . . . . . .  3
   3.2.2.  Examples of Creating a New Mailbox using \Important  . . .  4
   4.  Implementation Notes . . . . . . . . . . . . . . . . . . . . .  4
   5.  Security Considerations  . . . . . . . . . . . . . . . . . . .  5
   6.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . .  5
   6.1.  Registration of the $Important keyword . . . . . . . . . . .  5
   6.2.  Creation of the IMAP Mailbox Name Attributes Registry  . . .  6
   6.2.1.  Instructions to the Designated Expert  . . . . . . . . . .  7
   6.3.  Initial Entries for the IMAP Mailbox Name Attributes Registry 7
   7.  Changes During Document Development  . . . . . . . . . . . . .  8
   8.  Contributors . . . . . . . . . . . . . . . . . . . . . . . . .  9
   9.  References . . . . . . . . . . . . . . . . . . . . . . . . . .  9
   9.1.  Normative References . . . . . . . . . . . . . . . . . . . .  9
   9.2.  Informative References . . . . . . . . . . . . . . . . . . . 10
   Author's Address . . . . . . . . . . . . . . . . . . . . . . . . . 10

1.  Introduction

   The Internet Message Access Protocol (IMAP) specification [RFC3501]
   defines the use of message keywords, and an IMAP Keywords registry is
   created in [RFC5788].  [RFC6154] defines an extension to the IMAP
   LIST command for special-use mailboxes.  The extension allows servers
   to provide extra information (attributes) about the purpose of a
   mailbox and defines an initial set of special-use attributes.

   This document does the following:

   o  Defines a new message keyword, "$Important", to apply to messages
      that are considered important for the user, by some externally
      defined criteria.

   o  Registers the "$Important" keyword in the IMAP Keywords registry.

   o  Defines a new special-use attribute, "\Important", to designate a
      mailbox that will hold messages that are considered important for
      the user, by some externally defined criteria.

   o  Creates a registry for IMAP mailbox attributes and registers the
      new attribute and those defined in [RFC3348], [RFC3501], and
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