RFC 5490 · PROPOSED STANDARD · 2009
MON · 14 SEP 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.
Other RFCs from 2009
- RFC 5489 ECDHE_PSK Cipher Suites for Transport Layer Security
- RFC 5491 GEOPRIV Presence Information Data Format Location Object Usage Clarification, Considerations, and Recommendations
- RFC 5488 Network Mobility Management Information Base
- RFC 5492 Capabilities Advertisement with BGP-4
- RFC 5487 Pre-Shared Key Cipher Suites for TLS with SHA-256/384 and AES Galois Counter Mode
- RFC 5493 Requirements for the Conversion between Permanent Connections and Switched Connections in a Generalized Multiprotocol Label Switching Network
- RFC 5486 Session Peering for Multimedia Interconnect Terminology
- RFC 5494 IANA Allocation Guidelines for the Address Resolution Protocol