A Protocol for Remotely Managing Sieve Scripts
RFC 5804

Internet Engineering Task Force (IETF)                  A. Melnikov, Ed.
Request for Comments: 5804                                 Isode Limited
Category: Standards Track                                      T. Martin
ISSN: 2070-1721                                    BeThereBeSquare, Inc.
                                                               July 2010

              A Protocol for Remotely Managing Sieve Scripts

Abstract

   Sieve scripts allow users to filter incoming email.  Message stores
   are commonly sealed servers so users cannot log into them, yet users
   must be able to update their scripts on them.  This document
   describes a protocol "ManageSieve" for securely managing Sieve
   scripts on a remote server.  This protocol allows a user to have
   multiple scripts, and also alerts a user to syntactically flawed
   scripts.

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/rfc5804.

Copyright Notice

   Copyright (c) 2010 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.

Melnikov & Martin            Standards Track                    [Page 1]
RFC 5804                       ManageSieve                     July 2010

Table of Contents

   1. Introduction ....................................................3
      1.1. Commands and Responses .....................................3
      1.2. Syntax .....................................................3
      1.3. Response Codes .............................................3
      1.4. Active Script ..............................................6
      1.5. Quotas .....................................................6
      1.6. Script Names ...............................................6
      1.7. Capabilities ...............................................7
      1.8. Transport ..................................................9
      1.9. Conventions Used in This Document .........................10
   2. Commands .......................................................10
      2.1. AUTHENTICATE Command ......................................11
           2.1.1. Use of SASL PLAIN Mechanism over TLS ...............16
      2.2. STARTTLS Command ..........................................16
           2.2.1. Server Identity Check ..............................17
      2.3. LOGOUT Command ............................................20
      2.4. CAPABILITY Command ........................................20
      2.5. HAVESPACE Command .........................................20
      2.6. PUTSCRIPT Command .........................................21
      2.7. LISTSCRIPTS Command .......................................23
      2.8. SETACTIVE Command .........................................24
      2.9. GETSCRIPT Command .........................................25
      2.10. DELETESCRIPT Command .....................................25
      2.11. RENAMESCRIPT Command .....................................26
      2.12. CHECKSCRIPT Command ......................................27
      2.13. NOOP Command .............................................28
      2.14. Recommended Extensions ...................................28
           2.14.1. UNAUTHENTICATE Command ............................28
   3. Sieve URL Scheme ...............................................29
   4. Formal Syntax ..................................................31
   5. Security Considerations ........................................37
   6. IANA Considerations ............................................38
      6.1. ManageSieve Capability Registration Template ..............39
      6.2. Registration of Initial ManageSieve Capabilities ..........39
      6.3. ManageSieve Response Code Registration Template ...........41