RFC 6758 · INFORMATIONAL · 2012
MON · 14 SEP 2026
Tunneling of SMTP Message Transfer Priorities
Overview
RFC 6758, “Tunneling of SMTP Message Transfer Priorities”, is an Informational document published in October 2012 by A. Melnikov, K. Carlberg. The canonical text is published by the RFC Editor.
Abstract
This memo defines a mechanism for tunneling of SMTP (Simple Mail Transfer Protocol) Message Transfer Priority values through MTAs (Message Transfer Agents) that don't support the MT-PRIORITY SMTP extension. This document is not an Internet Standards Track specification; it is published for informational purposes.
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 6758 is hosted at rfc-editor.org. Available in TXT,HTML.
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