Additional Email Address Extension for the Extensible Provisioning Protocol
RFC 9873, “Additional Email Address Extension for the Extensible Provisioning Protocol”, is a Proposed Standard document published in October 2025 by D. Belyavsky, J. Gould, S. Hollenbeck. The canonical text is published by the RFC Editor.
Abstract
The Extensible Provisioning Protocol (EPP) does not inherently support internationalized email addresses because the specifications for these addresses did not exist when EPP was developed. This document describes a command-response extension that adds support for associating an additional email address with an EPP contact object. That additional email address can be either an internationalized email address or an ASCII-only address.
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.
The canonical text of RFC 9873 is hosted at rfc-editor.org. Available in HTML,TXT,PDF,XML.
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