@misc{rfc2821,
    series =    {Request for Comments},
    number =    2821,
    howpublished =  {RFC 2821},
    publisher = {RFC Editor},
    doi =       {10.17487/RFC2821},
    url =       {https://www.rfc-editor.org/info/rfc2821},
    author =    {Dr. John C. Klensin},
    title =     {{Simple Mail Transfer Protocol}},
    pagetotal = 79,
    year =      2001,
    month =     apr,
    day =       1,
    abstract =  {This document is a self-contained specification of the basic protocol for the Internet electronic mail transport. {[}STANDARDS-TRACK{]}},
}