RFC 5490 · PROPOSED STANDARD · 2009
THU · 30 JUL 2026
The Sieve Mail-Filtering Language -- Extensions for Checking Mailbox Status and Accessing Mailbox Metadata
Overview
RFC 5490, “The Sieve Mail-Filtering Language -- Extensions for Checking Mailbox Status and Accessing Mailbox Metadata”, is a Proposed Standard document published in March 2009 by A. Melnikov. The canonical text is published by the RFC Editor.
Abstract
This memo defines an extension to the Sieve mail filtering language (RFC 5228) for accessing mailbox and server annotations, checking for mailbox existence, and controlling mailbox creation on "fileinto" action. [STANDARDS-TRACK]
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 5490 is hosted at rfc-editor.org. Available in TXT,HTML.
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