draft-ietf-extra-sieve-mailboxid-04.txt   draft-ietf-extra-sieve-mailboxid-05.txt 
EXTRA B. Gondwana, Ed. EXTRA B. Gondwana, Ed.
Internet-Draft Fastmail Internet-Draft Fastmail
Updates: 5228 (if approved) 2 November 2020 Updates: 5228 (if approved) 19 November 2020
Intended status: Standards Track Intended status: Standards Track
Expires: 6 May 2021 Expires: 23 May 2021
Sieve Email Filtering: delivery by mailboxid Sieve Email Filtering: delivery by mailboxid
draft-ietf-extra-sieve-mailboxid-04 draft-ietf-extra-sieve-mailboxid-05
Abstract Abstract
The OBJECTID capability of the IMAP protocol (RFC8474) allows clients The OBJECTID capability of the IMAP protocol (RFC8474) allows clients
to identify mailboxes by a unique identifier which survives rename. to identify mailboxes by a unique identifier which survives rename.
This document extends the Sieve mail filtering language (RFC5228) to This document extends the Sieve mail filtering language (RFC5228) to
allow using that same unique identifier as a target for fileinto allow using that same unique identifier as a target for fileinto
rules, and for testing the existance of mailboxes. rules, and for testing the existance of mailboxes.
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Internet-Drafts are working documents of the Internet Engineering Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet- working documents as Internet-Drafts. The list of current Internet-
Drafts is at https://datatracker.ietf.org/drafts/current/. Drafts is at https://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress." material or to cite them other than as "work in progress."
This Internet-Draft will expire on 6 May 2021. This Internet-Draft will expire on 23 May 2021.
Copyright Notice Copyright Notice
Copyright (c) 2020 IETF Trust and the persons identified as the Copyright (c) 2020 IETF Trust and the persons identified as the
document authors. All rights reserved. document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents (https://trustee.ietf.org/ Provisions Relating to IETF Documents (https://trustee.ietf.org/
license-info) in effect on the date of publication of this document. license-info) in effect on the date of publication of this document.
Please review these documents carefully, as they describe your rights Please review these documents carefully, as they describe your rights
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provided without warranty as described in the Simplified BSD License. provided without warranty as described in the Simplified BSD License.
Table of Contents Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Conventions Used In This Document . . . . . . . . . . . . . . 3 2. Conventions Used In This Document . . . . . . . . . . . . . . 3
3. Sieve capability string . . . . . . . . . . . . . . . . . . . 3 3. Sieve capability string . . . . . . . . . . . . . . . . . . . 3
4. Argument ":mailboxid" to Command "fileinto" . . . . . . . . . 3 4. Argument ":mailboxid" to Command "fileinto" . . . . . . . . . 3
4.1. Interaction with "mailbox" extension . . . . . . . . . . 4 4.1. Interaction with "mailbox" extension . . . . . . . . . . 4
4.2. Interaction with "specialuse" extension . . . . . . . . . 4 4.2. Interaction with "specialuse" extension . . . . . . . . . 4
5. Interaction with "fcc" extension . . . . . . . . . . . . . . 5 5. Interaction with "fcc" extension . . . . . . . . . . . . . . 4
6. Test "mailboxidexists" . . . . . . . . . . . . . . . . . . . 5 6. Test "mailboxidexists" . . . . . . . . . . . . . . . . . . . 5
7. Interaction with variables extension . . . . . . . . . . . . 6 7. Interaction with variables extension . . . . . . . . . . . . 6
8. Formal Syntax . . . . . . . . . . . . . . . . . . . . . . . . 6 8. Formal Syntax . . . . . . . . . . . . . . . . . . . . . . . . 6
9. Security considerations . . . . . . . . . . . . . . . . . . . 6 9. Security considerations . . . . . . . . . . . . . . . . . . . 6
10. IANA considerations . . . . . . . . . . . . . . . . . . . . . 7 10. IANA considerations . . . . . . . . . . . . . . . . . . . . . 6
11. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 7 11. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 7
12. Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 12. Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
12.1. draft-ietf-sieve-mailboxid-04 . . . . . . . . . . . . . 7 12.1. draft-ietf-sieve-mailboxid-05 . . . . . . . . . . . . . 7
12.2. draft-ietf-sieve-mailboxid-03 . . . . . . . . . . . . . 7 12.2. draft-ietf-sieve-mailboxid-04 . . . . . . . . . . . . . 7
12.3. draft-ietf-sieve-mailboxid-02 . . . . . . . . . . . . . 7 12.3. draft-ietf-sieve-mailboxid-03 . . . . . . . . . . . . . 7
12.4. draft-ietf-sieve-mailboxid-01 . . . . . . . . . . . . . 8 12.4. draft-ietf-sieve-mailboxid-02 . . . . . . . . . . . . . 7
12.5. draft-ietf-sieve-mailboxid-00 . . . . . . . . . . . . . 8 12.5. draft-ietf-sieve-mailboxid-01 . . . . . . . . . . . . . 7
12.6. draft-gondwana-sieve-mailboxid-02 . . . . . . . . . . . 8 12.6. draft-ietf-sieve-mailboxid-00 . . . . . . . . . . . . . 8
12.7. draft-gondwana-sieve-mailboxid-01 . . . . . . . . . . . 8 12.7. draft-gondwana-sieve-mailboxid-02 . . . . . . . . . . . 8
12.8. draft-gondwana-sieve-mailboxid-00 . . . . . . . . . . . 8 12.8. draft-gondwana-sieve-mailboxid-01 . . . . . . . . . . . 8
12.9. draft-gondwana-sieve-mailboxid-00 . . . . . . . . . . . 8
13. Normative References . . . . . . . . . . . . . . . . . . . . 8 13. Normative References . . . . . . . . . . . . . . . . . . . . 8
14. Informative References . . . . . . . . . . . . . . . . . . . 9 14. Informative References . . . . . . . . . . . . . . . . . . . 9
Author's Address . . . . . . . . . . . . . . . . . . . . . . . . 10 Author's Address . . . . . . . . . . . . . . . . . . . . . . . . 9
1. Introduction 1. Introduction
[RFC5228] Sieve rules are sometimes created using graphical [RFC5228] Sieve rules are sometimes created using graphical
interfaces which allow users to select the mailbox to be used as a interfaces which allow users to select the mailbox to be used as a
target for a rule. target for a rule.
If that mailbox is renamed, the client may also update its internal If that mailbox is renamed, the client may also update its internal
representation of the rule and update the sieve script to match, representation of the rule and update the sieve script to match,
however this is a multi-step process and subject to partial failures. however this is a multi-step process and subject to partial failures.
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fileinto :mailboxid "Fnosuch" fileinto :mailboxid "Fnosuch"
:create :create
"INBOX.no-such-folder"; "INBOX.no-such-folder";
# creates INBOX.no-such-folder, but it doesn't # creates INBOX.no-such-folder, but it doesn't
# get the "Fnosuch" mailboxid. # get the "Fnosuch" mailboxid.
4.2. Interaction with "specialuse" extension 4.2. Interaction with "specialuse" extension
For servers which also support [!@RFC8579] delivery to special-use For servers which also support [!@RFC8579] delivery to special-use
mailboxes, if a fileinto command has both ":mailboxid" and ":special- mailboxes, it is an error to specify both ":mailboxid" and ":special-
use" specified, then the mailboxid is resolved first. use" in the same fileinto command.
If a mailbox with the specified mailboxid does not exist, then the
process specified in [!@RFC8579] is followed - which includes
processing of [!@RFC5490] ":create" tags to add the special-use to
the created mailbox.
Example:
require "fileinto";
require "mailboxid";
require "special-use";
if header :contains ["from"] "coyote" {
fileinto :mailboxid "F6352ae03-b7f5-463c-896f-d8b48ee3"
:specialuse "\\Junk"
"INBOX.harassment";
}
This means that if a mailbox with ID F6352ae03-b7f5-463c-896f-
d8b48ee3 exists, the email will be filed there, regardless of what
name or special-use it has, and regardless of whether a different
mailbox exists with either the special-use or name specified.
Example:
require "fileinto"; Advanced filtering based on both special-use and mailboxid can be
require "mailboxid"; built with explicit "specialuse_exists" and "mailboxidexists" tests.
require "mailbox";
require "special-use";
fileinto :mailboxid "F1234567" Note to developers of sieve generation tools: it is advisable to use
:specialuse "\\Archive" special-use rather than mailboxid when creating rules that are based
:create on a special-use purpose (e.g. delivery directly to the Junk folder
"INBOX.Archive"; based on a header that was added by a scanning agent earlier in the
# creates INBOX.Archive with use \Archive but mailflow).
# with a different mailboxid.
5. Interaction with "fcc" extension 5. Interaction with "fcc" extension
This document extends the definition of the ":fcc" argument defined This document extends the definition of the ":fcc" argument defined
in [RFC8580] so that it can optionally be used with the ":mailboxid" in [RFC8580] so that it can optionally be used with the ":mailboxid"
argument. argument.
FCC =/ [":mailboxid" <mailboxid: string>] FCC =/ [":mailboxid" <mailboxid: string>]
If the optional ":mailboxid" argument is specified with ":fcc", it If the optional ":mailboxid" argument is specified with ":fcc", it
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mailboxexists test, and from [RFC8579] for an example of modifying mailboxexists test, and from [RFC8579] for an example of modifying
the fileinto command. the fileinto command.
Thanks to Ned Freed and Ken Murchison and Alexey Melnikov for Thanks to Ned Freed and Ken Murchison and Alexey Melnikov for
feedback on the EXTRA mailing list. feedback on the EXTRA mailing list.
12. Changes 12. Changes
(EDITOR: remove this section before publication) (EDITOR: remove this section before publication)
12.1. draft-ietf-sieve-mailboxid-04 12.1. draft-ietf-sieve-mailboxid-05
* disallow :mailboxid and :special-use in the same fileinto action.
12.2. draft-ietf-sieve-mailboxid-04
* made RFC5490 and RFC8579 normative * made RFC5490 and RFC8579 normative
* clarified wording based on AD feedback from Barry * clarified wording based on AD feedback from Barry
12.2. draft-ietf-sieve-mailboxid-03 12.3. draft-ietf-sieve-mailboxid-03
* Fixed ABNF syntax error * Fixed ABNF syntax error
12.3. draft-ietf-sieve-mailboxid-02 12.4. draft-ietf-sieve-mailboxid-02
* removed bogus : from "mailboxidexists" test title * removed bogus : from "mailboxidexists" test title
* moved FCC to its own top-level section since it is not used with * moved FCC to its own top-level section since it is not used with
the fileinto command. the fileinto command.
12.4. draft-ietf-sieve-mailboxid-01 12.5. draft-ietf-sieve-mailboxid-01
* fixed idnits - RFC5228 not mentioned in the abstract * fixed idnits - RFC5228 not mentioned in the abstract
* fixed other I-D references I had missed, oops * fixed other I-D references I had missed, oops
12.5. draft-ietf-sieve-mailboxid-00 12.6. draft-ietf-sieve-mailboxid-00
* Adopted into working group per adoption call on list * Adopted into working group per adoption call on list
* Updated references to old drafts which have since been published. * Updated references to old drafts which have since been published.
* Fixed some typoes and simplified some language. * Fixed some typoes and simplified some language.
* Removed stray leading colon on mailboxexists (thanks Alexey) * Removed stray leading colon on mailboxexists (thanks Alexey)
* Added :fcc to the IANA registration description (thanks Alexey) * Added :fcc to the IANA registration description (thanks Alexey)
* Mentioned that variables can be expanded (thanks Alexey) * Mentioned that variables can be expanded (thanks Alexey)
12.6. draft-gondwana-sieve-mailboxid-02 12.7. draft-gondwana-sieve-mailboxid-02
* Update document date by a couple of years! Ooops, it got * Update document date by a couple of years! Ooops, it got
forgotten after a WGLC which got not dissent. forgotten after a WGLC which got not dissent.
* Create xml2rfc v3 output. * Create xml2rfc v3 output.
12.7. draft-gondwana-sieve-mailboxid-01 12.8. draft-gondwana-sieve-mailboxid-01
* Switch to :mailboxid tagged parameter value with fallback mailbox * Switch to :mailboxid tagged parameter value with fallback mailbox
name. name.
* Document interaction with "mailbox". * Document interaction with "mailbox".
* Document interaction with "special-use". * Document interaction with "special-use".
* Document interaction with "fcc". * Document interaction with "fcc".
* Document security considerations around :mailboxid and :create. * Document security considerations around :mailboxid and :create.
12.8. draft-gondwana-sieve-mailboxid-00 12.9. draft-gondwana-sieve-mailboxid-00
* Initial version. * Initial version.
13. Normative References 13. Normative References
[RFC8174] Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC [RFC2342] Gahrns, M. and C. Newman, "IMAP4 Namespace", RFC 2342,
2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174, DOI 10.17487/RFC2342, May 1998,
May 2017, <https://www.rfc-editor.org/info/rfc8174>. <https://www.rfc-editor.org/info/rfc2342>.
[RFC5228] Guenther, P., Ed. and T. Showalter, Ed., "Sieve: An Email [RFC8580] Murchison, K. and B. Gondwana, "Sieve Extension: File
Filtering Language", RFC 5228, DOI 10.17487/RFC5228, Carbon Copy (FCC)", RFC 8580, DOI 10.17487/RFC8580, May
January 2008, <https://www.rfc-editor.org/info/rfc5228>. 2019, <https://www.rfc-editor.org/info/rfc8580>.
[RFC8474] Gondwana, B., Ed., "IMAP Extension for Object [RFC8474] Gondwana, B., Ed., "IMAP Extension for Object
Identifiers", RFC 8474, DOI 10.17487/RFC8474, September Identifiers", RFC 8474, DOI 10.17487/RFC8474, September
2018, <https://www.rfc-editor.org/info/rfc8474>. 2018, <https://www.rfc-editor.org/info/rfc8474>.
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, Requirement Levels", BCP 14, RFC 2119,
DOI 10.17487/RFC2119, March 1997, DOI 10.17487/RFC2119, March 1997,
<https://www.rfc-editor.org/info/rfc2119>. <https://www.rfc-editor.org/info/rfc2119>.
[RFC2342] Gahrns, M. and C. Newman, "IMAP4 Namespace", RFC 2342, [RFC8174] Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC
DOI 10.17487/RFC2342, May 1998, 2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174,
<https://www.rfc-editor.org/info/rfc2342>. May 2017, <https://www.rfc-editor.org/info/rfc8174>.
[RFC8580] Murchison, K. and B. Gondwana, "Sieve Extension: File [RFC5228] Guenther, P., Ed. and T. Showalter, Ed., "Sieve: An Email
Carbon Copy (FCC)", RFC 8580, DOI 10.17487/RFC8580, May Filtering Language", RFC 5228, DOI 10.17487/RFC5228,
2019, <https://www.rfc-editor.org/info/rfc8580>. January 2008, <https://www.rfc-editor.org/info/rfc5228>.
14. Informative References 14. Informative References
[RFC3501] Crispin, M., "INTERNET MESSAGE ACCESS PROTOCOL - VERSION
4rev1", RFC 3501, DOI 10.17487/RFC3501, March 2003,
<https://www.rfc-editor.org/info/rfc3501>.
[RFC8579] Bosch, S., "Sieve Email Filtering: Delivering to Special-
Use Mailboxes", RFC 8579, DOI 10.17487/RFC8579, May 2019,
<https://www.rfc-editor.org/info/rfc8579>.
[RFC4314] Melnikov, A., "IMAP4 Access Control List (ACL) Extension", [RFC4314] Melnikov, A., "IMAP4 Access Control List (ACL) Extension",
RFC 4314, DOI 10.17487/RFC4314, December 2005, RFC 4314, DOI 10.17487/RFC4314, December 2005,
<https://www.rfc-editor.org/info/rfc4314>. <https://www.rfc-editor.org/info/rfc4314>.
[RFC5490] Melnikov, A., "The Sieve Mail-Filtering Language -- [RFC5490] Melnikov, A., "The Sieve Mail-Filtering Language --
Extensions for Checking Mailbox Status and Accessing Extensions for Checking Mailbox Status and Accessing
Mailbox Metadata", RFC 5490, DOI 10.17487/RFC5490, March Mailbox Metadata", RFC 5490, DOI 10.17487/RFC5490, March
2009, <https://www.rfc-editor.org/info/rfc5490>. 2009, <https://www.rfc-editor.org/info/rfc5490>.
[RFC5229] Homme, K., "Sieve Email Filtering: Variables Extension", [RFC5229] Homme, K., "Sieve Email Filtering: Variables Extension",
RFC 5229, DOI 10.17487/RFC5229, January 2008, RFC 5229, DOI 10.17487/RFC5229, January 2008,
<https://www.rfc-editor.org/info/rfc5229>. <https://www.rfc-editor.org/info/rfc5229>.
[RFC8579] Bosch, S., "Sieve Email Filtering: Delivering to Special-
Use Mailboxes", RFC 8579, DOI 10.17487/RFC8579, May 2019,
<https://www.rfc-editor.org/info/rfc8579>.
[RFC3501] Crispin, M., "INTERNET MESSAGE ACCESS PROTOCOL - VERSION
4rev1", RFC 3501, DOI 10.17487/RFC3501, March 2003,
<https://www.rfc-editor.org/info/rfc3501>.
Author's Address Author's Address
Bron Gondwana (editor) Bron Gondwana (editor)
Fastmail Fastmail
Level 2, 114 William St Level 2, 114 William St
Melbourne VIC 3000 Melbourne VIC 3000
Australia Australia
Email: brong@fastmailteam.com Email: brong@fastmailteam.com
URI: https://www.fastmail.com URI: https://www.fastmail.com
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