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RFC5819 - IMAP4 Extension for Returning STATUS Information in Extended LIST
Many IMAP clients display information about total number of messages / total number of unseen messages in IMAP mailboxes. In order to do that, they are forced to issue a LIST or LSUB command and to list all available mailboxes, followed by a STATUS command for each mailbox found. This document provides an extension to LIST command that allows the client to request STATUS information for mailboxes together with other information typically returned by the LIST command. [STANDARDS-TRACK]
RFC5957 - Display-Based Address Sorting for the IMAP4 SORT Extension
This document describes an IMAP protocol extension enabling server- side message sorting on the commonly displayed portion of the From and To header fields. [STANDARDS-TRACK]
RFC6154 - IMAP LIST Extension for Special-Use Mailboxes
Some IMAP message stores include special-use mailboxes, such as those used to hold draft messages or sent messages. Many mail clients allow users to specify where draft or sent messages should be put, but configuring them requires that the user know which mailboxes the server has set aside for these purposes. This extension adds new optional mailbox attributes that a server may include in IMAP LIST command responses to identify special-use mailboxes to the client, easing configuration. [STANDARDS-TRACK]
RFC6203 - IMAP4 Extension for Fuzzy Search
This document describes an IMAP protocol extension enabling a server to perform searches with inexact matching and assigning relevancy scores for matched messages. [STANDARDS-TRACK]
RFC6237 - IMAP4 Multimailbox SEARCH Extension
The IMAP4 specification allows the searching of only the selected mailbox. A user often wants to search multiple mailboxes, and a client that wishes to support this must issue a series of SELECT and SEARCH commands, waiting for each to complete before moving on to the next. This extension allows a client to search multiple mailboxes with one command, limiting the round trips and waiting for various searches to complete, and not requiring disruption of the currently selected mailbox. This extension also uses MAILBOX and TAG fields in ESEARCH responses, allowing a client to pipeline the searches if it chooses. This document updates RFC 4466. This document defines an Experimental Protocol for the Internet community.