RFC 4551

IMAP Extension for Conditional STORE Operation or Quick Flag Changes Resynchronization, June 2006

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Obsoleted by:
RFC 7162
RFC 3501
A. Melnikov
S. Hole
imapext (app)

Cite this RFC: TXT  |  XML

DOI:  http://dx.doi.org/10.17487/RFC4551

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Often, multiple IMAP (RFC 3501) clients need to coordinate changes to a common IMAP mailbox. Examples include different clients working on behalf of the same user, and multiple users accessing shared mailboxes. These clients need a mechanism to synchronize state changes for messages within the mailbox. They must be able to guarantee that only one client can change message state (e.g., message flags) at any time. An example of such an application is use of an IMAP mailbox as a message queue with multiple dequeueing clients. The Conditional Store facility provides a protected update mechanism for message state information that can detect and resolve conflicts between multiple writing mail clients. The Conditional Store facility also allows a client to quickly resynchronize mailbox flag changes. This document defines an extension to IMAP (RFC 3501). [STANDARDS-TRACK]

For the definition of Status, see RFC 2026.

For the definition of Stream, see RFC 4844.

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