The IESG has approved the following document: - 'The Require-Recipient-Valid-Since Header Field and SMTP Service Extension' (draft-ietf-appsawg-rrvs-header-field-10.txt) as Proposed Standard This document is the product of the Applications Area Working Group. The IESG contact persons are Barry Leiba and Pete Resnick. A URL of this Internet Draft is: http://datatracker.ietf.org/doc/draft-ietf-appsawg-rrvs-header-field/ Technical Summary This document defines an extension for the Simple Mail Transfer Protocol called RRVS, and a header field called 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 these facilities is on automatically generated messages that might contain sensitive information, though it may also be useful in other applications. Review and Consensus The document has gone through 7 iterations, starting with the -00 draft published as an I-D on August 18, 2013, and the most recent -05 version posted on January 10, 2014. Each iteration represents updates to the document following discussion on the AppsArea WG discussion list (apps-discuss@ietf.org). There have been approximately a dozen active contributors throughout the process, representing strong engagement. By way of example of the impact of the review by the AppsArea WG, the initial draft focused on the addition of a header field within the message as a means to identifying continuous ownership of the mailbox. Through the conversation, however, it became clear that the community felt it was more appropriate to perform the validation through the addition of an SMTP extension. At the conclusion of the discussion, the document was updated and now includes an SMTP extension. Personnel The document shepherd is J. Trent Adams. The responsible Area Director is Barry Leiba.
