%% You should probably cite rfc2505 instead of this I-D.
@techreport{lindberg-anti-spam-mta-08,
    number =    {draft-lindberg-anti-spam-mta-08},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-lindberg-anti-spam-mta/08/},
    author =    {Gunnar Lindberg},
    title =     {{Anti-Spam Recommendations for SMTP MTAs}},
    pagetotal = 24,
    year =      1999,
    month =     jan,
    day =       6,
    abstract =  {This memo gives a number of implementation recommendations for SMTP, MTAs (Mail Transfer Agents, e.g. sendmail,) to make them more capable of reducing the impact of spam. This document specifies an Internet Best Current Practices for the Internet Community, and requests discussion and suggestions for improvements.},
}