< 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.
	skipping to change at page 7, line 26 ¶		skipping to change at page 7, line 26 ¶
	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
End of changes. 18 change blocks.
	48 lines changed or deleted		43 lines changed or added
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