@techreport{stumpf-dns-mtamark-04,
    number =    {draft-stumpf-dns-mtamark-04},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-stumpf-dns-mtamark/04/},
    author =    {Markus Stumpf},
    title =     {{Marking Mail Transfer Agents in Reverse DNS with TXT RRs}},
    pagetotal = 12,
    year =      2005,
    month =     may,
    day =       2,
    abstract =  {In contrast to other more extensive approaches to deal with unsolicited email, commonly called "spam", this memo discusses a very simple authentication scheme. It uses marking of hosts in reverse DNS (IN-ADDR.ARPA and IP6.ARPA zones) to allow the receiving mail transfer agents to decide whether the connecting (sending) host is a designated mail transfer agent (MTA) or not. Despite being a weaker scheme than most of the other proposals currently discussed, it can reduce the amount of spam and viruses/ worms significantly and has the advantage that it can be implemented based on existing and well-established Internet technology like DNS without any changes to that technology. This document is part of the LMAP work of the Anti-Spam Research Group (ASRG) of the IRTF.},
}