draft-ietf-extra-sieve-mailboxid-00.txt   draft-ietf-extra-sieve-mailboxid-01.txt 
EXTRA B. Gondwana, Ed. EXTRA B. Gondwana, Ed.
Internet-Draft Fastmail Internet-Draft Fastmail
Updates: 5228 (if approved) 30 July 2020 Updates: 5228 (if approved) 30 July 2020
Intended status: Standards Track Intended status: Standards Track
Expires: 31 January 2021 Expires: 31 January 2021
Sieve Email Filtering: delivery by mailboxid Sieve Email Filtering: delivery by mailboxid
draft-ietf-extra-sieve-mailboxid-00 draft-ietf-extra-sieve-mailboxid-01
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.
skipping to change at page 2, line 30 skipping to change at page 2, line 30
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
4.3. Interaction with "fcc" extension . . . . . . . . . . . . 5 4.3. Interaction with "fcc" extension . . . . . . . . . . . . 5
5. Test ":mailboxidexists" . . . . . . . . . . . . . . . . . . . 5 5. Test ":mailboxidexists" . . . . . . . . . . . . . . . . . . . 5
6. Interaction with variables extension . . . . . . . . . . . . 6 6. Interaction with variables extension . . . . . . . . . . . . 6
7. Formal Syntax . . . . . . . . . . . . . . . . . . . . . . . . 6 7. Formal Syntax . . . . . . . . . . . . . . . . . . . . . . . . 6
8. Security considerations . . . . . . . . . . . . . . . . . . . 6 8. Security considerations . . . . . . . . . . . . . . . . . . . 6
9. IANA considerations . . . . . . . . . . . . . . . . . . . . . 7 9. IANA considerations . . . . . . . . . . . . . . . . . . . . . 7
10. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 7 10. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 7
11. Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 11. Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
11.1. draft-ietf-sieve-mailboxid-00 . . . . . . . . . . . . . 7 11.1. draft-ietf-sieve-mailboxid-01 . . . . . . . . . . . . . 7
11.2. draft-gondwana-sieve-mailboxid-02 . . . . . . . . . . . 7 11.2. draft-ietf-sieve-mailboxid-00 . . . . . . . . . . . . . 7
11.3. draft-gondwana-sieve-mailboxid-01 . . . . . . . . . . . 8 11.3. draft-gondwana-sieve-mailboxid-02 . . . . . . . . . . . 8
11.4. draft-gondwana-sieve-mailboxid-00 . . . . . . . . . . . 8 11.4. draft-gondwana-sieve-mailboxid-01 . . . . . . . . . . . 8
11.5. draft-gondwana-sieve-mailboxid-00 . . . . . . . . . . . 8
12. Normative References . . . . . . . . . . . . . . . . . . . . 8 12. Normative References . . . . . . . . . . . . . . . . . . . . 8
13. Informative References . . . . . . . . . . . . . . . . . . . 9 13. Informative References . . . . . . . . . . . . . . . . . . . 9
Author's Address . . . . . . . . . . . . . . . . . . . . . . . . 9 Author's Address . . . . . . . . . . . . . . . . . . . . . . . . 9
1. Introduction 1. Introduction
Sieve rules are sometimes created using graphical interfaces which [RFC5228] Sieve rules are sometimes created using graphical
allow users to select the mailbox to be used as a target for a rule. 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 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.
Also, if the folder is renamed by a different mechanism (e.g. another Also, if the folder is renamed by a different mechanism (e.g. another
IMAP client) the rules will get out of sync. IMAP client) the rules will get out of sync.
By extending "fileinto" to reference an immutable mailboxid, sieve By extending "fileinto" to reference the immutable mailboxid
rules can continue to target the same mailbox, even if it gets specified by [RFC8474] , sieve rules can continue to target the same
renamed. mailbox, even if it gets renamed.
2. Conventions Used In This Document 2. Conventions Used In This Document
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
"OPTIONAL" in this document are to be interpreted as described in BCP "OPTIONAL" in this document are to be interpreted as described in BCP
14 [RFC2119] [RFC8174] when, and only when, they appear in all 14 [RFC2119] [RFC8174] when, and only when, they appear in all
capitals, as shown here. capitals, as shown here.
3. Sieve capability string 3. Sieve capability string
skipping to change at page 6, line 42 skipping to change at page 6, line 42
There is no special interaction defined, however as an objectid is a There is no special interaction defined, however as an objectid is a
string in this document, objectid values can contain variable string in this document, objectid values can contain variable
expansions if [RFC5229] is enabled. expansions if [RFC5229] is enabled.
7. Formal Syntax 7. Formal Syntax
test /= "mailboxidexists" string-list test /= "mailboxidexists" string-list
tag /= ":mailboxid" string tag /= ":mailboxid" string
If [I-D.ietf-extra-sieve-fcc] is supported: If [RFC8580] is supported:
FCC =/ [":mailboxid" <mailboxid: string>] FCC =/ [":mailboxid" <mailboxid: string>]
8. Security considerations 8. Security considerations
Because mailboxid is always generated by the server, implementations Because mailboxid is always generated by the server, implementations
MUST NOT allow sieve to make an endrun around this protection by MUST NOT allow sieve to make an endrun around this protection by
creating mailboxes with the specified ID by using ":create" and creating mailboxes with the specified ID by using ":create" and
":mailboxid" in a fileinto rule for a non-existant mailbox. ":mailboxid" in a fileinto rule for a non-existant mailbox.
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Capability name: mailboxid Capability name: mailboxid
Description: adds a test for checking mailbox existence by objectid, Description: adds a test for checking mailbox existence by objectid,
and new optional arguments to fileinto and :fcc which and new optional arguments to fileinto and :fcc which
allow selecting the destination mailbox by objectid. allow selecting the destination mailbox by objectid.
RFC number: this RFC RFC number: this RFC
Contact address: The EXTRA discussion list <extra@ietf.org> Contact address: The EXTRA discussion list <extra@ietf.org>
10. Acknowledgements 10. Acknowledgements
This document borrows heavily from [RFC5490] for the matching This document borrows heavily from [RFC5490] for the matching
mailboxexists test, and from [I-D.ietf-extra-sieve-special-use] for mailboxexists test, and from [RFC8579] for an example of modifying
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.
11. Changes 11. Changes
(EDITOR: remove this section before publication) (EDITOR: remove this section before publication)
11.1. draft-ietf-sieve-mailboxid-00 11.1. draft-ietf-sieve-mailboxid-01
* fixed idnits - RFC5228 not mentioned in the abstract
* fixed other I-D references I had missed, oops
11.2. 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)
skipping to change at page 7, line 47 skipping to change at page 8, line 4
* 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)
11.2. draft-gondwana-sieve-mailboxid-02 11.3. 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.
11.3. draft-gondwana-sieve-mailboxid-01 11.4. 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.
11.4. draft-gondwana-sieve-mailboxid-00 11.5. draft-gondwana-sieve-mailboxid-00
* Initial version. * Initial version.
12. Normative References 12. Normative References
[RFC5228] Guenther, P., Ed. and T. Showalter, Ed., "Sieve: An Email
Filtering Language", RFC 5228, DOI 10.17487/RFC5228,
January 2008, <https://www.rfc-editor.org/info/rfc5228>.
[RFC8474] Gondwana, B., Ed., "IMAP Extension for Object
Identifiers", RFC 8474, DOI 10.17487/RFC8474, September
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>.
[RFC5228] Guenther, P., Ed. and T. Showalter, Ed., "Sieve: An Email
Filtering Language", RFC 5228, DOI 10.17487/RFC5228,
January 2008, <https://www.rfc-editor.org/info/rfc5228>.
[RFC8174] Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC [RFC8174] Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC
2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174, 2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174,
May 2017, <https://www.rfc-editor.org/info/rfc8174>. May 2017, <https://www.rfc-editor.org/info/rfc8174>.
[RFC2342] Gahrns, M. and C. Newman, "IMAP4 Namespace", RFC 2342, [RFC2342] Gahrns, M. and C. Newman, "IMAP4 Namespace", RFC 2342,
DOI 10.17487/RFC2342, May 1998, DOI 10.17487/RFC2342, May 1998,
<https://www.rfc-editor.org/info/rfc2342>. <https://www.rfc-editor.org/info/rfc2342>.
[RFC8474] Gondwana, B., Ed., "IMAP Extension for Object
Identifiers", RFC 8474, DOI 10.17487/RFC8474, September
2018, <https://www.rfc-editor.org/info/rfc8474>.
[RFC8580] Murchison, K. and B. Gondwana, "Sieve Extension: File
Carbon Copy (FCC)", RFC 8580, DOI 10.17487/RFC8580, May
2019, <https://www.rfc-editor.org/info/rfc8580>.
13. Informative References 13. Informative References
[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>.
[I-D.ietf-extra-sieve-special-use]
Bosch, S., "Sieve Email Filtering: Delivering to Special-
Use Mailboxes", Work in Progress, Internet-Draft, draft-
ietf-extra-sieve-special-use-05, 24 January 2019,
<https://tools.ietf.org/html/draft-ietf-extra-sieve-
special-use-05>.
[RFC5229] Homme, K., "Sieve Email Filtering: Variables Extension",
RFC 5229, DOI 10.17487/RFC5229, January 2008,
<https://www.rfc-editor.org/info/rfc5229>.
[RFC8579] Bosch, S., "Sieve Email Filtering: Delivering to Special- [RFC8579] Bosch, S., "Sieve Email Filtering: Delivering to Special-
Use Mailboxes", RFC 8579, DOI 10.17487/RFC8579, May 2019, Use Mailboxes", RFC 8579, DOI 10.17487/RFC8579, May 2019,
<https://www.rfc-editor.org/info/rfc8579>. <https://www.rfc-editor.org/info/rfc8579>.
[RFC8580] Murchison, K. and B. Gondwana, "Sieve Extension: File
Carbon Copy (FCC)", RFC 8580, DOI 10.17487/RFC8580, May
2019, <https://www.rfc-editor.org/info/rfc8580>.
[RFC3501] Crispin, M., "INTERNET MESSAGE ACCESS PROTOCOL - VERSION [RFC3501] Crispin, M., "INTERNET MESSAGE ACCESS PROTOCOL - VERSION
4rev1", RFC 3501, DOI 10.17487/RFC3501, March 2003, 4rev1", RFC 3501, DOI 10.17487/RFC3501, March 2003,
<https://www.rfc-editor.org/info/rfc3501>. <https://www.rfc-editor.org/info/rfc3501>.
[RFC5229] Homme, K., "Sieve Email Filtering: Variables Extension",
RFC 5229, DOI 10.17487/RFC5229, January 2008,
<https://www.rfc-editor.org/info/rfc5229>.
[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>.
[I-D.ietf-extra-sieve-fcc]
Murchison, K. and B. Gondwana, "Sieve Extension: File
Carbon Copy (Fcc)", Work in Progress, Internet-Draft,
draft-ietf-extra-sieve-fcc-09, 13 January 2019,
<https://tools.ietf.org/html/draft-ietf-extra-sieve-fcc-
09>.
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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