Sieve Email Filtering: delivery by mailboxid
draft-ietf-extra-sieve-mailboxid-01
EXTRA B. Gondwana, Ed.
Internet-Draft Fastmail
Updates: 5228 (if approved) 30 July 2020
Intended status: Standards Track
Expires: 31 January 2021
Sieve Email Filtering: delivery by mailboxid
draft-ietf-extra-sieve-mailboxid-01
Abstract
The OBJECTID capability of the IMAP protocol (RFC8474) allows clients
to identify mailboxes by a unique identifier which survives rename.
This document extends the Sieve mail filtering language (RFC5228) to
allow using that same unique identifier as a target for fileinto
rules, and for testing the existance of mailboxes.
Status of This Memo
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This Internet-Draft will expire on 31 January 2021.
Copyright Notice
Copyright (c) 2020 IETF Trust and the persons identified as the
document authors. All rights reserved.
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Conventions Used In This Document . . . . . . . . . . . . . . 3
3. Sieve capability string . . . . . . . . . . . . . . . . . . . 3
4. Argument ":mailboxid" to Command "fileinto" . . . . . . . . . 3
4.1. Interaction with "mailbox" extension . . . . . . . . . . 4
4.2. Interaction with "specialuse" extension . . . . . . . . . 4
4.3. Interaction with "fcc" extension . . . . . . . . . . . . 5
5. Test ":mailboxidexists" . . . . . . . . . . . . . . . . . . . 5
6. Interaction with variables extension . . . . . . . . . . . . 6
7. Formal Syntax . . . . . . . . . . . . . . . . . . . . . . . . 6
8. Security considerations . . . . . . . . . . . . . . . . . . . 6
9. IANA considerations . . . . . . . . . . . . . . . . . . . . . 7
10. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 7
11. Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
11.1. draft-ietf-sieve-mailboxid-01 . . . . . . . . . . . . . 7
11.2. draft-ietf-sieve-mailboxid-00 . . . . . . . . . . . . . 7
11.3. draft-gondwana-sieve-mailboxid-02 . . . . . . . . . . . 8
11.4. draft-gondwana-sieve-mailboxid-01 . . . . . . . . . . . 8
11.5. draft-gondwana-sieve-mailboxid-00 . . . . . . . . . . . 8
12. Normative References . . . . . . . . . . . . . . . . . . . . 8
13. Informative References . . . . . . . . . . . . . . . . . . . 9
Author's Address . . . . . . . . . . . . . . . . . . . . . . . . 9
1. Introduction
[RFC5228] Sieve rules are sometimes created using graphical
interfaces which allow users to select the mailbox to be used as a
target for a rule.
If that mailbox is renamed, the client may also update its internal
representation of the rule and update the sieve script to match,
however this is a multi-step process and subject to partial failures.
Also, if the folder is renamed by a different mechanism (e.g. another
IMAP client) the rules will get out of sync.
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By extending "fileinto" to reference the immutable mailboxid
specified by [RFC8474] , sieve rules can continue to target the same
mailbox, even if it gets renamed.
2. Conventions Used In This Document
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
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