@misc{rfc8904,
    series =    {Request for Comments},
    number =    8904,
    howpublished =  {RFC 8904},
    publisher = {RFC Editor},
    doi =       {10.17487/RFC8904},
    url =       {https://www.rfc-editor.org/info/rfc8904},
    author =    {Alessandro Vesely},
    title =     {{DNS Whitelist (DNSWL) Email Authentication Method Extension}},
    pagetotal = 12,
    year =      2020,
    month =     sep,
    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.},
}