RFC 3864 · BEST CURRENT PRACTICE · 2004
SAT · 13 JUN 2026
Registration Procedures for Message Header Fields
Overview
RFC 3864, “Registration Procedures for Message Header Fields”, is a Best Current Practice document published in September 2004 by G. Klyne, M. Nottingham, J. Mogul. It has since been updated by RFC 9110. The canonical text is published by the RFC Editor.
Abstract
This specification defines registration procedures for the message header fields used by Internet mail, HTTP, Netnews and other applications. This document specifies an Internet Best Current Practices for the Internet Community, and requests discussion and suggestions for improvements.
What “Best Current Practice” means
Documents the IETF community's recommended operational or procedural practice rather than a protocol specification.
Read this RFC
The canonical text of RFC 3864 is hosted at rfc-editor.org. Available in TXT,HTML.
Relationships to other RFCs
Other RFCs from 2004
- RFC 3863 Presence Information Data Format
- RFC 3865 A No Soliciting Simple Mail Transfer Protocol Service Extension
- RFC 3862 Common Presence and Instant Messaging : Message Format
- RFC 3866 Language Tags and Ranges in the Lightweight Directory Access Protocol
- RFC 3861 Address Resolution for Instant Messaging and Presence
- RFC 3867 Payment Application Programmers Interface for v1.0 Internet Open Trading Protocol
- RFC 3860 Common Profile for Instant Messaging
- RFC 3868 Signalling Connection Control Part User Adaptation Layer