%% You should probably cite draft-melnikov-smtp-metadata-01 instead of this revision.
@techreport{melnikov-smtp-metadata-00,
    number =    {draft-melnikov-smtp-metadata-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-melnikov-smtp-metadata/00/},
    author =    {Alexey Melnikov},
    title =     {{Simple Mail Transfer Protocol extension for relaying Metadata}},
    pagetotal = 11,
    year =      2015,
    month =     mar,
    day =       7,
    abstract =  {This memo defines an extension to the SMTP (Simple Mail Transfer Protocol) service whereby message metadata (such as Trace header fields, IMAP flags, Keying material, etc) can be transferred in separate containers similar to BDAT (RFC 3030, SMTP CHUNKING) command. This allows clean separation of transaction related state from the message itself.},
}