IMAP Extension for Conditional STORE operation

Document Type Replaced Internet-Draft (individual)
Last updated 2012-08-16 (latest revision 2003-01-06)
Replaced by draft-ietf-imapext-condstore
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Expired & archived
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


Often, multiple IMAP clients need to coordinate changes to a common IMAP mailbox. Examples include different clients for 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 or annotations) 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 writers.


Alexey Melnikov (
Steve Hole (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)