%% You should probably cite draft-ietf-jmap-smime-sender-extensions instead of this I-D.
@techreport{melnikov-jmap-smime-advanced-00,
    number =    {draft-melnikov-jmap-smime-advanced-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-jmap-smime-advanced/00/},
    author =    {Alexey Melnikov},
    title =     {{JMAP extension for S/MIME signing and encryption}},
    pagetotal = 6,
    year =      2021,
    month =     jul,
    day =       12,
    abstract =  {This document specifies an extension to JMAP for sending S/MIME signed and S/MIME encrypted messages.},
}