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Proposed Charter

Lemonade brings together a body of work related to Internet messaging, in particular work done by the VPIM, FAX, IMAPEXT and other IETF working groups. The goal is to provide a set of enhancements and profiles of Internet email submission, transport, and retrieval protocols to facilitate operation in environments which use Internet-based technologies but which have link characteristics, device characteristics, or service environments that are significantly different from those common on the Internet. 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.

Given the potentially broad scope of "unified messaging", this working group will focus specifically on the following work items:

0. An informational RFC will be produced on LEMONADE requirements.

1. Enhance the existing IMAP4 message retrieval protocol to satisfy the requirements for streaming playback of multimedia content.

2. Enhance the exsiting IMAP4 message retrieval protocol to facilitate its use with devices that have limited capabilities such as mobile endpoints. The existing standards-track CONNEG framework will be used if content negotiation capabilities are needed.

3. Create a message notification protocol for the specific purpose of servers reporting message status information to other servers.

4. Create a specification describing the use of Internet message services in environments where message delivery may take place using either Internet protocols or the external protocols [list TBD].

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 BOF is aware of several related activities in other groups:

- SIP [specifics to be filled in by Allison]
- 3GPP TSG T WG2 SWG3 Messaging Click Here
- W3C Mulitmodal interaction Activity Click Here
- Open Mobile Alliance Click Here
- 3GPP2 TSG-P Click Here
- 3GPP2 TSG-N Click Here

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 BOF does not expect to coordinate with those groups.

Milestones (document completion)

Dec 2002 - LEMONADE Requirements

Mar 2002 - Server to server notification protocol

May 2003 - IMAP extensions for VM playback

Jul 2003 - IMAP extensions for mobile devices

Nov 2003 - Translation to and from other messaging systems

Drafts to be used as input for working group deliverables (grouped per milestone)

- draft-vaudreuil-um-issues-00.txt
- draft-burger-um-reqts-00.txt
- draft-wong-umcli-00.txt

- draft-shapira-snap-04.txt

- draft-burger-imap-chanuse-00.txt
- draft-nerenberg-imap-channel-01.txt

- draft-neystadt-imap-status-counters-00.txt
- draft-shveidel-mediasize-00.txt
- draft-vaudreuil-futuredelivery-00.txt