%% You should probably cite rfc7293 instead of this I-D. @techreport{ietf-appsawg-rrvs-header-field-02, number = {draft-ietf-appsawg-rrvs-header-field-02}, type = {Internet-Draft}, institution = {Internet Engineering Task Force}, publisher = {Internet Engineering Task Force}, note = {Work in Progress}, url = {https://datatracker.ietf.org/doc/draft-ietf-appsawg-rrvs-header-field/02/}, author = {William Mills and Murray Kucherawy}, title = {{The "Require Recipient Valid Since" SMTP Service Extension}}, pagetotal = 9, year = 2013, month = nov, day = 6, abstract = {This document defines an extension for the Simple Mail Transfer Protocol, called RRVS (for "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 facility is on automatically generated messages that might contain sensitive information, though it may also be useful in other applications.}, }