Internet Engineering Task Force

Enhancements to Internet email to Support Diverse Service Environments (lemonade)

In addition to this official charter maintained by the IETF Secretariat, there is additional information about this working group on the Web at:
Additional LEMONADE Web Page

Last Modified: 2009-08-20

Additional information is available at tools.ietf.org/wg/lemonade

Chair(s):

Applications Area Director(s):

Applications Area Advisor:

Alexey Melnikov <alexey.melnikov@isode.com>

Secretary(ies):

Alexey Melnikov <alexey.melnikov@isode.com>

Mailing Lists:

General Discussion: lemonade@ietf.org
To Subscribe: lemonade-request@ietf.org
In Body: in boby 'subscribe'
Archive: http://www.ietf.org/mail-archive/web/lemonade/index.html

Description of Working Group:

Lemonade is tasked to provide a set of enhancements and profiles of
Internet email submission, transport, and retrieval protocols to
facilitate operation on platforms with constrained resources, or
communications links with high latency or limited bandwidth. A primary
goal of this work is to ensure that those profiles and enhancements
continue to interoperate with the existing Internet email protocols in
use on the Internet, so that these environments and more traditional
Internet users have access to a seamless service.

Lemonade's work is at the crossroads of a body of work related to
Internet messaging, in particular work done by the VPIM, FAX, and
IMAPEXT IETF working groups. Given the potentially broad scope of
activities this group could engage in, the group will focus
specifically on the following work items:

0. An informational RFC or RFCs will be produced on LEMONADE
architecture and the issues it seeks to address.

1. Enhance the existing IMAP4 message retrieval and message submission
(RFC 2476) protocols to satisfy the requirements for handling
streaming
multimedia content. The existing standards-track CONNEG framework will
be used if content negotiation capabilities are needed. The group will
employ existing protocols (such as for streaming) with IMAP4 instead
of
duplicating such functionality within IMAP4.

2. Enhance the existing IMAP4 message retrieval and/or message
submission (RFC 2476) protocols to satisfy the requirements for
forwarding a message and/or its attachments without downloading
the message to the client and subsequently uploading the message to a
server.

3. Refine the existing IMAP4 message retrieval protocol to facilitate
its use with devices that have limited capabilities such as mobile
endpoints. At most one backwards compatible profile of IMAP4 will be
produced by this effort.

4. Define a format for message notifications for servers reporting
message status information to other servers. Specify the method for
delivery of those notifications.

5. Create a specification describing the use of Internet message
services in environments where message delivery may take place using
either Internet protocols or through an MMS server using WAP to
communicate with the receiving user agent.

Any protocols defined by this working group will include appopriate
security mechanisms, including authentication, privacy, and access
control. Mandatory-to-implement security mechanisms will be specified
as needed in order to guarantee secure protocol interoperability.

The transport area will be consulted to deal with any transport-related
issues that arise, especially in regards to items 1-4 above.

The IAB is currently working on the specification of general
guidelines
and requirements for notification services. Once complete this work
will be used as input to item 4 above.

The working group is aware of several related activities in other
groups:

- 3GPP TSG T WG2 SWG3 Messaging <http://www.3gpp.org/TB/T/T2/T2.htm>
- W3C Mulitmodal interaction Activity <http://www.w3.org/2002/mmi/>
- Open Mobile Alliance <http://www.openmobilealliance.org/>
- 3GPP2 TSG-X <http://3gpp2.org/Public_html/X/index.cfm>

The goal is to coordinate efforts with at least these groups as
required.

While there is obvious synergy, given the end-of-life of the VPIM and
FAX work groups and the similar membership, the working group does not
expect to coordinate with these other groups.

Goals and Milestones:

Done		Submit LEMONADE goals and use-cases specification to the IESG
Done		Submit server to server notification requirements to the IESG
Done		Submit translation to other messaging systems to the IESG
Done		Submit IMAP/SUBMIT extensions for forward without download to IESG
Done		Submit IMAP4 profile for mobile devices to the IESG
Done		Submit IMAP COMPRESS Extension to the IESG
Done		Submit Deployment Considerations to the IESG
Done		Submit IMAP WITHIN Search extension to the IESG
Done		Submit SASL-IR IMAP4 extension to the IESG
Done		Submit IMAP CONVERT extension to the IESG
Done		Submit Quick Reconnect extension to the IESG
Done		Submit Update to RFC 2192 (IMAP URL) to the IESG
Done		Submit Message Events to IESG
Done		Submit contextual mailboxes extension to the IESG
Done		Submit Body Conversions to IESG
Done		Submit IMAP Sieve Extensions to IESG
Done		Submit URLFETCH BINARY Extension to the IESG
Done		Submit Notification Format to the IESG
Done		Submit IMAP NOTIFY Extension to the IESG
Done		Submit Notification Architecture to the IESG
Done		Submit IMAP4 extensions for streaming multimedia to the IESG
Done		Submit Profile bis document to the IESG

Internet-Drafts:

Support for Sieve in Internet Message Access Protocol (IMAP4) (38930 bytes)

Request For Comments:

Mapping Between the Multimedia Messaging Service (MMS) and Internet Mail (RFC 4356) (69427 bytes)
Goals for Internet Messaging to Support Diverse Service Environments (RFC 4416) (93676 bytes)
Internet Message Access Protocol (IMAP) CATENATE Extension (RFC 4469) (21822 bytes) updates RFC 3501,RFC 3502/ updated by RFC 5550
Internet Message Access Protocol (IMAP) - URLAUTH Extension (RFC 4467) (36714 bytes) updated by RFC 5092,RFC 5550
Message Submission BURL Extension (RFC 4468) (28614 bytes) updates RFC 3463/ updated by RFC 5248
Internet Email to Support Diverse Service Environments (Lemonade) Profile (RFC 4550) (48790 bytes) obsoleted by RFC 5550
The IMAP COMPRESS Extension (RFC 4978) (17554 bytes)
WITHIN Search extension to the IMAP Protocol (RFC 5032) (8921 bytes) updates RFC 3501
IMAP URL Scheme (RFC 5092) (65197 bytes) obsoletes RFC 2192/ updates RFC 4467
IMAP4 Extensions for Quick Mailbox Resynchronization (RFC 5162) (51620 bytes)
Internet Message Access Protocol - CONVERT extension (RFC 5259) (63831 bytes)
Deployment Considerations for Lemonade-Compliant Mobile Email (RFC 5383) (28290 bytes)
The IMAP NOTIFY Extension (RFC 5465) (46208 bytes) updates RFC 5267
IMAP4 Extension for Named Searches (Filters) (RFC 5466) (19415 bytes)
LEMONADE Architecture - Supporting Open Mobile Alliance (OMA) Mobile Email (MEM) using Internet Mail (RFC 5442) (28758 bytes)
Internet Message Store Events (RFC 5423) (34800 bytes)
Extended URLFETCH for Binary and Converted Parts (RFC 5524) (15915 bytes)
The Internet Email to Support Diverse Service Environments (Lemonade) Profile (RFC 5550) (84862 bytes) obsoletes RFC 4550/ updates RFC 4469,RFC 4467
Lemonade Notifications Architecture (RFC 5551) (27542 bytes)
Streaming Internet Messaging Attachments (RFC 5616) (65579 bytes)