RFC 9590 · PROPOSED STANDARD · 2024
SUN · 14 JUN 2026
IMAP Extension for Returning Mailbox METADATA in Extended LIS
Overview
RFC 9590, “IMAP Extension for Returning Mailbox METADATA in Extended LIS”, is a Proposed Standard document published in May 2024 by K. Murchison, B. Gondwana. The canonical text is published by the RFC Editor.
Abstract
This document defines an extension to the Internet Message Access Protocol (IMAP) LIST command that allows the client to request mailbox annotations (metadata), along with other information typically returned by the LIST command.
What “Proposed Standard” means
An entry-level standards-track specification: stable, peer-reviewed and a solid basis for implementation, though it may still evolve before becoming an Internet Standard.
Read this RFC
The canonical text of RFC 9590 is hosted at rfc-editor.org. Available in HTML,TXT,PDF,XML.
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