%% You should probably cite rfc8904 instead of this I-D.
@techreport{vesely-authmethod-dnswl-16,
    number =    {draft-vesely-authmethod-dnswl-16},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-vesely-authmethod-dnswl/16/},
    author =    {Alessandro Vesely},
    title =     {{DNS Whitelist (DNSWL) Email Authentication Method Extension}},
    pagetotal = 12,
    year =      2020,
    month =     apr,
    day =       30,
    abstract =  {This document describes an email authentication method compliant with RFC 8601. The method consists of looking up the sender's IP address in a DNS whitelist. This document provides information in case the method is seen in the field, suggests a useful practice, and registers the relevant keywords. This document does not consider blacklists.},
}