@misc{rfc5451,
    series =    {Request for Comments},
    number =    5451,
    howpublished =  {RFC 5451},
    publisher = {RFC Editor},
    doi =       {10.17487/RFC5451},
    url =       {https://www.rfc-editor.org/info/rfc5451},
    author =    {Murray Kucherawy},
    title =     {{Message Header Field for Indicating Message Authentication Status}},
    pagetotal = 43,
    year =      2009,
    month =     apr,
    abstract =  {This memo defines a new header field for use with electronic mail messages to indicate the results of message authentication efforts. Any receiver-side software, such as mail filters or Mail User Agents (MUAs), may use this message header field to relay that information in a convenient way to users or to make sorting and filtering decisions. {[}STANDARDS-TRACK{]}},
}