%% You should probably cite rfc4155 instead of this I-D.
@techreport{hall-mime-app-mbox-04,
    number =    {draft-hall-mime-app-mbox-04},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-hall-mime-app-mbox/04/},
    author =    {Professor Eric B. Hall},
    title =     {{The application/mbox Media Type}},
    pagetotal = 9,
    year =      2005,
    month =     feb,
    day =       7,
    abstract =  {This memo requests that the application/mbox media type be authorized for allocation by the IESG, according to the terms specified in RFC 2048. This memo also defines a default format for the mbox database, which must be supported by all conformant implementations. This memo provides information for the Internet community.},
}