RFC INTERNET MESSAGE ACCESS PROTOCOL – VERSION 4rev1, March Canonical URL: ; File formats . [RFC ] IMAP/POP AUTHorize Extension for Simple [RFC ] INTERNET MESSAGE ACCESS PROTOCOL – VERSION 4rev1. RFC List. RFC. Problem Solved. Plan for new Protocol. RFC Internet Message Access Protocol – Version 4. Replaced by See

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Support Sieve – possibly even sieve fragments as “run this filter on this mailbox”.

Many IMAP4 extensions to the base protocol have been proposed and are in common use. IMAP was designed with the goal of permitting complete imxp of an email box by multiple email clients, therefore clients generally leave messages on the server until the user explicitly deletes them. System flags indicate state information such as whether a message has been read.

Internet Message Access Protocol

These clients need a mechanism to synchronize state changes for messages within the mailbox. In particular, replacing pairs of mutually exclusive options with a “tristate” makes sense.

Was there really a point? Timo Sirainen, Dave Cridland.

Expand scope considerably – IDLE is insufficient for many users, because it only monitors one mailbox. But this one has a problem, it doesn’t let you sort across folders, which makes it imapp half the solution.

See for example RFC section 5. In doubt, RFC is authorative. An example of such an application is use of an IMAP mailbox as a message queue with multiple dequeueing clients. E-mail clients using IMAP generally leave messages on the server until iamp user explicitly deletes them. This memo has been defined to provide the definition of a common format rfv openly exchanging calendaring and scheduling information across the Internet.


Clients may store local copies of the messages, but these are considered to be a temporary cache. Also need to handle the case of “partial IO error” – where data exists but can not be returned immediately for some reason.

This mechanism avoids requiring clients to download every message in the mailbox in order to perform these searches. Specify one mailbox layout only. Explicity allow space for extention. Unlike some proprietary protocols which combine sending and retrieval operations, imsp a message and saving a copy in a server-side folder with a base-level IMAP client requires transmitting the message content twice, once to SMTP for delivery 33501 a second time to IMAP to store in a sent mail folder.

evolution-kolab – RFC Reference

The URI syntax defines a grammar that is a superset of all valid URIs, allowing an implementation to parse the common components of a URI reference without knowing the scheme-specific requirements of every possible identifier. Fix insufficient information being returned from commands to synchronise state.

Extend more – allow both private and shared “special uses”, because there are contexts where both make sense. See comment – will be mooted. Sending mail via an IMAP connection”. Non-authorative addendum to RFC The POP protocol requires the currently connected client to be imao only client connected to the mailbox.

Definitely want token based access so you rvc authenticate once and then re-connect with the same token, at least during the same “session”. Heirarchy separator will either be forced or not exist tree data structure on the wire.


Examples include different clients working on behalf of the same user, and multiple users accessing shared mailboxes. The Conditional Store facility also allows a client to quickly resynchronize mailbox flag changes. In contrast, the IMAP protocol specifically allows lmap access by multiple clients and provides mechanisms for clients to detect changes made to the mailbox by other, concurrently connected, clients.

Archived from the original on For instance, the specification states that each message stored on the server has a “unique id” to allow the clients to identify messages they have already seen between sessions. The IMAP specification has been criticised for being insufficiently strict and allowing behaviours that effectively negate its usefulness.

However, the specification also allows these UIDs to be invalidated with no restrictions, practically defeating their purpose.

May need to consider individual folders vs “entire user” in the context of folder-level ACLs. With the IDLE command, the server can tell the client that a mailbox status has changed.

RFC’s – hMailServer – Free open source email server for Microsoft Windows

Reflecting the experience of earlier Internet protocols, IMAP4 defines an explicit mechanism by umap it may be extended. It defines several new access control rights and clarifies which rights are required for different IMAP commands.

This document is a revision of RFC