Internet Message Access Protocol (IMAP) - Version 4rev2
draft-ietf-extra-imap4rev2-18
Network Working Group A. Melnikov, Ed.
Internet-Draft Isode Ltd
Obsoletes: 3501 (if approved) B. Leiba, Ed.
Intended status: Standards Track Futurewei Technologies
Expires: March 19, 2021 September 15, 2020
Internet Message Access Protocol (IMAP) - Version 4rev2
draft-ietf-extra-imap4rev2-18
Abstract
The Internet Message Access Protocol, Version 4rev2 (IMAP4rev2)
allows a client to access and manipulate electronic mail messages on
a server. IMAP4rev2 permits manipulation of mailboxes (remote
message folders) in a way that is functionally equivalent to local
folders. IMAP4rev2 also provides the capability for an offline
client to resynchronize with the server.
IMAP4rev2 includes operations for creating, deleting, and renaming
mailboxes, checking for new messages, permanently removing messages,
setting and clearing flags, RFC 5322, RFC 2045 and RFC 2231 parsing,
searching, and selective fetching of message attributes, texts, and
portions thereof. Messages in IMAP4rev2 are accessed by the use of
numbers. These numbers are either message sequence numbers or unique
identifiers.
IMAP4rev2 does not specify a means of posting mail; this function is
handled by a mail submission protocol such as RFC 6409.
Status of This Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute
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Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."
This Internet-Draft will expire on March 19, 2021.
Melnikov & Leiba Expires March 19, 2021 [Page 1]
Internet-Draft IMAP4rev2 September 2020
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Table of Contents
1. How to Read This Document . . . . . . . . . . . . . . . . . . 5
1.1. Organization of This Document . . . . . . . . . . . . . . 5
1.2. Conventions Used in This Document . . . . . . . . . . . . 5
1.3. Special Notes to Implementors . . . . . . . . . . . . . . 6
2. Protocol Overview . . . . . . . . . . . . . . . . . . . . . . 7
2.1. Link Level . . . . . . . . . . . . . . . . . . . . . . . 7
2.2. Commands and Responses . . . . . . . . . . . . . . . . . 7
2.2.1. Client Protocol Sender and Server Protocol Receiver . 7
2.2.2. Server Protocol Sender and Client Protocol Receiver . 8
2.3. Message Attributes . . . . . . . . . . . . . . . . . . . 9
2.3.1. Message Numbers . . . . . . . . . . . . . . . . . . . 9
2.3.2. Flags Message Attribute . . . . . . . . . . . . . . . 11
2.3.3. Internal Date Message Attribute . . . . . . . . . . . 13
2.3.4. [RFC-5322] Size Message Attribute . . . . . . . . . . 14
2.3.5. Envelope Structure Message Attribute . . . . . . . . 14
2.3.6. Body Structure Message Attribute . . . . . . . . . . 14
2.4. Message Texts . . . . . . . . . . . . . . . . . . . . . . 14
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