%% You should probably cite rfc8970 instead of this I-D.
@techreport{ietf-extra-imap-fetch-preview-06,
    number =    {draft-ietf-extra-imap-fetch-preview-06},
    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-extra-imap-fetch-preview/06/},
    author =    {Michael Slusarz},
    title =     {{IMAP4 Extension: Message Preview Generation}},
    pagetotal = 14,
    year =      2019,
    month =     jul,
    day =       1,
    abstract =  {This document specifies an Internet Message Access Protocol (IMAP) protocol extension allowing a client to request a server-generated abbreviated representation of message data useful as a contextual preview of the entire message.},
}