%% You should probably cite rfc2821 instead of this I-D. @techreport{ietf-drums-smtpupd-13, number = {draft-ietf-drums-smtpupd-13}, 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-drums-smtpupd/13/}, author = {Dr. John C. Klensin}, title = {{Simple Mail Transfer Protocol}}, pagetotal = 79, year = 2000, month = sep, day = 27, abstract = {This document is a self-contained specification of the basic protocol for the Internet electronic mail transport. {[}STANDARDS-TRACK{]}}, }