The Require-Recipient-Valid-Since Header Field

Document Type Replaced Internet-Draft (appsawg WG)
Authors William Mills  , Murray Kucherawy 
Last updated 2013-08-19 (latest revision 2013-08-02)
Replaced by RFC 7293
Stream Internet Engineering Task Force (IETF)
Intended RFC status (None)
Expired & archived
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Stream WG state Adopted by a WG
Awaiting Merge with Other Document
Document shepherd No shepherd assigned
IESG IESG state Replaced by draft-ietf-appsawg-rrvs-header-field
Consensus Boilerplate Unknown
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


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.)