"INTERNET MESSAGE ACCESS PROTOCOL - SORT AND THREAD EXTENSIONS", Mark Crispin, Ken Murchison, 13-Mar-08. ( bytes)

This document describes the base-level server-based sorting and threading extensions to the [IMAP] protocol. These extensions provide substantial performance improvements for IMAP clients which offer sorted and threaded views.

"IMAP ANNOTATE Extension", Randall Gellens, Cyrus Daboo, 19-Oct-06. ( bytes)

The ANNOTATE extension to the Internet Message Access Protocol permits clients and servers to maintain "meta data" for messages, or individual message parts, stored in a mailbox on the server. For example, this can be used to attach comments and other useful information to a message. It is also possible to attach annotations to specific parts of a message, so that, for example, they could be marked as seen or important, or a comment added.

"IMAP4 LIST Command Extensions", Barry Leiba, Alexey Melnikov, 26-Sep-06. ( bytes)

IMAP4 has two commands for listing mailboxes: LIST and LSUB. As we have added extensions, such as Mailbox Referrals, that have required specialized lists we have had to expand the number of list commands, since each extension must add its function to both LIST and LSUB, and these commands are not, as they are defined, extensible. If we've needed the extensions to work together, we've had to add a set of commands to mix the different options, the set increasing in size 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.

"Internet Message Access Protocol Internationalization", Chris Newman, Arnt Gulbrandsen, Alexey Melnikov, 1-Feb-08. ( bytes)

Internet Message Access Protocol (IMAP) version 4rev1 has basic support for non-ASCII characters in mailbox names and search substrings. It also supports non-ASCII message headers and content encoded as specified by Multipurpose Internet Mail Extensions (MIME). This specification defines a collection of IMAP extensions which improve international support including comparator negotiation for search, sort and thread, language negotiation for international error text, and translations for namespace prefixes.

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