%% You should probably cite rfc6758 instead of this I-D. @techreport{melnikov-smtp-priority-tunneling-01, number = {draft-melnikov-smtp-priority-tunneling-01}, type = {Internet-Draft}, institution = {Internet Engineering Task Force}, publisher = {Internet Engineering Task Force}, note = {Work in Progress}, url = {https://datatracker.ietf.org/doc/draft-melnikov-smtp-priority-tunneling/01/}, author = {Alexey Melnikov and Ken Carlberg}, title = {{Tunneling of SMTP Message Transfer Priorities}}, pagetotal = 13, year = 2012, month = may, day = 2, abstract = {This memo defines a mechanism for tunneling of SMTP (Simple Mail Transfer Protocol) Message Transfer Priority values through MTAs (Message Transfer Agents) that don't support the MT-PRIORITY SMTP extension.}, }