%% You should probably cite draft-ietf-appsawg-email-auth-codes instead of this I-D. @techreport{kucherawy-email-auth-codes-00, number = {draft-kucherawy-email-auth-codes-00}, type = {Internet-Draft}, institution = {Internet Engineering Task Force}, publisher = {Internet Engineering Task Force}, note = {Work in Progress}, url = {https://datatracker.ietf.org/doc/draft-kucherawy-email-auth-codes/00/}, author = {Murray Kucherawy}, title = {{Email Authentication Status Codes}}, pagetotal = 5, year = 2014, month = jan, day = 29, abstract = {There is at present no way to return a status code to an email client that indicates a message is being rejected or deferred specifically because of email authentication failures. This document registers codes for this purpose.}, }