Network Working Group A. Melnikov
Request for Comments: 5490 Isode Limited
Category: Standards Track March 2009
The Sieve Mail-Filtering Language --
Extensions for Checking Mailbox Status and Accessing Mailbox Metadata
Status of This Memo
This document specifies an Internet standards track protocol for the
Internet community, and requests discussion and suggestions for
improvements. Please refer to the current edition of the "Internet
Official Protocol Standards" (STD 1) for the standardization state
and status of this protocol. Distribution of this memo is unlimited.
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Abstract
This memo defines an extension to the Sieve mail filtering language
(RFC 5228) for accessing mailbox and server annotations, checking for
mailbox existence, and controlling mailbox creation on "fileinto"
action.
Melnikov Standards Track [Page 1]RFC 5490 Sieve METADATA March 2009Table of Contents
1. Introduction ....................................................2
2. Conventions Used in This Document ...............................2
3. "mailbox" and "mboxmetadata" Extensions .........................2
3.1. Test "mailboxexists" .......................................2
3.2. ":create" Argument to "fileinto" Command ...................3
3.3. Test "metadata" ............................................4
3.4. Test "metadataexists" ......................................4
4. "servermetadata" Extension ......................................5
4.1. Test "servermetadata" ......................................5
4.2. Test "servermetadataexists" ................................6
5. Security Considerations .........................................6
6. IANA Considerations .............................................7
7. Acknowledgements ................................................7
8. References ......................................................8
8.1. Normative References .......................................8
8.2. Informative References .....................................8
1. Introduction
This memo defines an extension to the Sieve mail filtering language
[SIEVE] for accessing mailbox and server annotations. This allows
for customization of the Sieve engine behaviour based on variables
set using [METADATA].
This document also defines an extension for checking for mailbox
existence and for controlling mailbox creation on "fileinto" action.
2. Conventions Used in This Document
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in [KEYWORDS].
Conventions for notations are as in [SIEVE] Section 1.1, including
the use of [ABNF].
This document is written with an assumption that readers are familiar
with the data model and terms defined in Section 3 of [METADATA].
3. "mailbox" and "mboxmetadata" Extensions3.1. Test "mailboxexists"
Usage: mailboxexists <mailbox-names: string-list>
Melnikov Standards Track [Page 2]
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