RFC 5703 · PROPOSED STANDARD · 2009
SUN · 14 JUN 2026
Sieve Email Filtering: MIME Part Tests, Iteration, Extraction, Replacement, and Enclosure
Overview
RFC 5703, “Sieve Email Filtering: MIME Part Tests, Iteration, Extraction, Replacement, and Enclosure”, is a Proposed Standard document published in October 2009 by T. Hansen, C. Daboo. The canonical text is published by the RFC Editor.
Abstract
This document defines extensions to the Sieve email filtering language to permit analysis and manipulation of the MIME body parts of an email message. [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 5703 is hosted at rfc-editor.org. Available in TXT,HTML.
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