@misc{rfc3848,
    series =    {Request for Comments},
    number =    3848,
    howpublished =  {RFC 3848},
    publisher = {RFC Editor},
    doi =       {10.17487/RFC3848},
    url =       {https://www.rfc-editor.org/info/rfc3848},
    author =    {Chris Newman},
    title =     {{ESMTP and LMTP Transmission Types Registration}},
    pagetotal = 4,
    year =      2004,
    month =     jul,
    abstract =  {This registers seven new mail transmission types (ESMTPA, ESMTPS, ESMTPSA, LMTP, LMTPA, LMTPS, LMTPSA) for use in the "with" clause of a Received header in an Internet message. {[}STANDARDS-TRACK{]}},
}