Sieve Email Filtering: delivery by mailboxid
draft-ietf-extra-sieve-mailboxid-03
EXTRA B. Gondwana, Ed.
Internet-Draft Fastmail
Updates: 5228 (if approved) September 4, 2020
Intended status: Standards Track
Expires: March 8, 2021
Sieve Email Filtering: delivery by mailboxid
draft-ietf-extra-sieve-mailboxid-03
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 March 8, 2021.
Copyright Notice
Copyright (c) 2020 IETF Trust and the persons identified as the
document authors. All rights reserved.
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Internet-Draft Sieve MAILBOXID September 2020
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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
5. Interaction with "fcc" extension . . . . . . . . . . . . . . 5
6. Test "mailboxidexists" . . . . . . . . . . . . . . . . . . . 5
7. Interaction with variables extension . . . . . . . . . . . . 6
8. Formal Syntax . . . . . . . . . . . . . . . . . . . . . . . . 6
9. Security considerations . . . . . . . . . . . . . . . . . . . 6
10. IANA considerations . . . . . . . . . . . . . . . . . . . . . 7
11. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 7
12. Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
12.1. draft-ietf-sieve-mailboxid-03 . . . . . . . . . . . . . 7
12.2. draft-ietf-sieve-mailboxid-02 . . . . . . . . . . . . . 7
12.3. draft-ietf-sieve-mailboxid-01 . . . . . . . . . . . . . 7
12.4. draft-ietf-sieve-mailboxid-00 . . . . . . . . . . . . . 8
12.5. draft-gondwana-sieve-mailboxid-02 . . . . . . . . . . . 8
12.6. draft-gondwana-sieve-mailboxid-01 . . . . . . . . . . . 8
12.7. draft-gondwana-sieve-mailboxid-00 . . . . . . . . . . . 8
13. Normative References . . . . . . . . . . . . . . . . . . . . 8
14. 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
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