The IESG has approved the following document: - 'IMAP4 LIST Command Extensions ' <draft-ietf-imapext-list-extensions-18.txt> as a Proposed Standard This document is the product of the Internet Message Access Protocol Extension Working Group. The IESG contact persons are Lisa Dusseault and Ted Hardie. A URL of this Internet-Draft is: http://www.ietf.org/internet-drafts/draft-ietf-imapext-list-extensions-18.txt Technical Summary IMAP4 [RFC 3501] has two commands for listing mailboxes: LIST and LSUB. Unfortunately, these commands are not extensible: As extensions requiring specialized lists have been added to IMAP, new list commands have to be added toinclude the functions of both LIST and LSUB. If the extensions need to work together with other commands, a set of commands mixing the different options must be added, increasing the size of the set with each new extension. This document describes an extension to the base LIST command that will allow these additions to be done with mutually compatible options to the LIST command, avoiding the exponential increase in specialized list commands. It extends the allowable options in the LIST command itself as well as extending the allowable return options. The new options allow for the return of information for the Child Mailbox Extension [RFC 33480] as well as providing functionality to replace (and eventually deprecate) the Mailbox Referrals RLIST and RLSUB commands [RFC 2193]. Working Group Summary This document is a product of the IMAP Extensions (IMAPEXT) Working Group. This document has received *extensive* review in the working group. However, unlike some documents that might have gone through 17 versions over the course of 5+ years, this document does in fact seem to be the product of good working group consensus, not simply working group exhaustion. It took quite a long time and several versions for the working group to settle on the right balance between richness of functionality (e.g., in different properties that could be requestedand returned) and the ease of implementation. As new working group members have come on board over the years with new IMAP client and server implementations, features were tuned to accommodate those implementors. Approximately half-a-dozen implementations of the spec (including both servers and clients) have been implemented to date and corrections to the document have been made in response. Overall, the working group is quite happy with the results. Protocol Quality Pete Resnick, IMAP Extensions (IMAPEXT) working group chair, and Lisa Dusseault,reviewed this document for the IESG. _______________________________________________ IETF-Announce@ietf.org https://www1.ietf.org/mailman/listinfo/ietf-announce
