%% You should probably cite rfc4096 instead of this I-D.
@techreport{malamud-subject-line-05,
    number =    {draft-malamud-subject-line-05},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-malamud-subject-line/05/},
    author =    {Carl Malamud},
    title =     {{Policy-Mandated Labels Such as "Adv:" in Email Subject Headers Considered Ineffective At Best}},
    pagetotal = 14,
    year =      2005,
    month =     apr,
    day =       5,
    abstract =  {This memo discusses policies that require certain labels to be inserted in the "Subject:" header of a mail message. Such policies are difficult to specify accurately while remaining compliant with key RFCs and are likely to be ineffective at best. This memo discusses an alternate, \textbackslash{}\%standards-compliant approach that is significantly simpler to specify and is somewhat less likely to be ineffective. This memo provides information for the Internet community.},
}