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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Timo Sirainen, Dave Cridland.

IMAP, Internet Message Access Protocol

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.

Specify one mailbox layout only. Either use them as-is, or map into annotation-space. See comment – will be mooted.

Notification of mail arrival is done through in-band signalingwhich contributes to the complexity of client-side IMAP protocol handling somewhat. Will need an Access Rfcc mechanism. IMAP keywords should not be confused with proprietary labels of web-based e-mail services which are sometimes translated into IMAP folders by the corresponding proprietary servers. Heirarchy separator will either be forced or not exist tree data structure on the wire.

The specification has an example: Has some best-practices how well-behaving IMAP servers should behave.

Much of this complexity e. Unlike some proprietary protocols which combine sending and retrieval operations, sending 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 and a second time to IMAP to store in a sent mail folder.


Make sure protocol supports simple access to emails.

Internet Message Access Protocol

Specify shared vs private “same keyword”, e. The user retrieves the messages with an e-mail client that uses one of a number rff e-mail retrieval protocols. While some clients and servers preferentially use vendor-specific, proprietary protocols[3] almost all support POP and IMAP for retrieving e-mail – allowing many free choice between many e-mail clients such as Pegasus Mail or Mozilla Thunderbird to access these servers, and allows the clients to be used with other servers.

Except making LIST extensible and giving tiny bandwidth improvements and tiny server performance improvements There are a few cases covering list andling – it’s a lot more complex than the small amount of actual data involved justifies.

The best approach for ‘push’ e-mail”. Folder listing is one of the major pain points for client authors. The IMAP4 protocol supports both predefined system flags and client-defined keywords. Also fuzzy gfc and partial response is an interesting area.

evolution-kolab – RFC Reference

An IMAP server typically listens on port number Expand scope considerably – IDLE is insufficient for many users, because it only monitors one mailbox. With the IDLE command, the server can tell the client that a mailbox status has changed.

From Wikipedia, the free encyclopedia. Ideally, part of a more general “compose commands” – but the ability to store a search result for later manipulation will be needed. The IMAP specification has been criticised for being insufficiently strict and allowing behaviours that effectively negate its usefulness. There are a few cases covering list andling – it’s a lot more complex than the small amount of actual data involved justifies.


Many IMAP4 extensions to the base protocol have been proposed and are in common use. 351

May need to consider individual folders vs “entire user” in the context of folder-level ACLs. The POP protocol requires the currently connected client to be the only client connected to the mailbox. It is possible to store data on a per-mailbox basis or on the server as a whole. E-mail clients using IMAP generally leave messages on the server until the user explicitly deletes them. Make it easy to not only get status data, but to get a list of which folders have changed since last request.

Sending mail via an IMAP connection”. Impa allow space for extention. These clients need a mechanism to synchronize state changes for messages within the mailbox.

An Email Iap Language and all the extentions Support Sieve – possibly even sieve fragments as “run this filter on this mailbox”.

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.

No copies of the original interim protocol specification or its software exist. Also need to handle the case of “partial IO error” – where data exists but can not be returned immediately for some reason.