Sign in
Version 5.13.0, 2015-03-25
Report a bug

The Require-Recipient-Valid-Since Header Field

Document type: Replaced Internet-Draft (appsawg WG)
Document stream: IETF
Last updated: 2013-08-19 (latest revision 2013-08-02)
Intended RFC status: Unknown
Other versions: (expired, archived): plain text, pdf, html

IETF State: Adopted by a WG
Awaiting Merge with Other Document
Document shepherd: No shepherd assigned

IESG State: Replaced by draft-ietf-appsawg-rrvs-header-field
Responsible AD: (None)
Send notices to: No addresses provided

This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found here:


This document defines an email header field, Require-Recipient-Valid- Since, to provide a method for senders to indicate to receivers the time when the sender last confirmed the ownership of the target mailbox. This can be used to detect changes of mailbox ownership, and thus prevent mail from being delivered to the wrong party. The intended use of this header field is on automatically generated messages that might contain sensitive information.


William Mills <>
Murray Kucherawy <>

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid)