%% You should probably cite rfc3028 instead of this I-D.
@techreport{showalter-sieve-11,
    number =    {draft-showalter-sieve-11},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-showalter-sieve/11/},
    author =    {Tim Showalter},
    title =     {{Sieve: A Mail Filtering Language}},
    pagetotal = 36,
    year =      2000,
    month =     may,
    day =       10,
    abstract =  {This document describes a language for filtering e-mail messages at time of final delivery. {[}STANDARDS-TRACK{]}},
}