RFC 9979 · INFORMATIONAL · 2026
MON · 27 JUL 2026
Registration of Further IMAP/JMAP Keywords and Mailbox Name Attributes
Overview
RFC 9979, “Registration of Further IMAP/JMAP Keywords and Mailbox Name Attributes”, is an Informational document published in May 2026 by N. Jenkins, D. Eggert. The canonical text is published by the RFC Editor.
Abstract
This document defines a number of keywords and mailbox name attributes that have been in use across different server and client implementations. It defines the intended use of these keywords and mailbox name attributes. This document registers all of these with IANA to avoid name collisions.
What “Informational” means
Published for the general information of the community. It does not define an IETF standard and carries no standards-track status.
Read this RFC
The canonical text of RFC 9979 is hosted at rfc-editor.org. Available in HTML,TXT,PDF,XML.
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