@techreport{levine-fsv-01,
    number =    {draft-levine-fsv-01},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-levine-fsv/01/},
    author =    {John R. Levine},
    title =     {{A Flexible Method to Validate SMTP Senders in DNS}},
    pagetotal = 7,
    year =      2004,
    month =     apr,
    day =       26,
    abstract =  {Flexible Sender Validation (FSV) is a lightweight validation technique to detect and deter some kinds of e-mail address forgery. It publishes information in the DNS about IP addresses authorized to send mail for a domain, one in a family of IP based mail validation proposals dating back to Paul Vixie's original in 2002{[}5{]}. FSV uses redundant copies of IP data to permit both efficient use by very high-volume mail servers, and simple implementation on low to moderate volume mail servers.},
}