@misc{rfc1870,
    series =    {Request for Comments},
    number =    1870,
    howpublished =  {RFC 1870},
    publisher = {RFC Editor},
    doi =       {10.17487/RFC1870},
    url =       {https://www.rfc-editor.org/info/rfc1870},
    author =    {Dr. John C. Klensin and Ned Freed and Keith Moore},
    title =     {{SMTP Service Extension for Message Size Declaration}},
    pagetotal = 9,
    year =      1995,
    month =     nov,
    abstract =  {This memo defines an extension to the SMTP service whereby an SMTP client and server may interact to give the server an opportunity to decline to accept a message (perhaps temporarily) based on the client's estimate of the message size. {[}STANDARDS-TRACK{]}},
}