@techreport{dukhovni-smtp-opportunistic-tls-01,
    number =    {draft-dukhovni-smtp-opportunistic-tls-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-dukhovni-smtp-opportunistic-tls/01/},
    author =    {Viktor Dukhovni and Wes Hardaker},
    title =     {{SMTP security via opportunistic DANE TLS}},
    pagetotal = 17,
    year =      2013,
    month =     jul,
    day =       15,
    abstract =  {This memo describes a protocol for opportunistic TLS security based on the DANE TLSA DNS record. The design goal is an incremental transition of the Internet email backbone (MTA to MTA SMTP traffic) from today's unauthenticated and unencrypted connections to TLS encrypted and authenticated delivery when the client is DANE TLSA aware and the server domain publishes DANE TLSA records for its MX hosts.},
}