@misc{rfc1426,
    series =    {Request for Comments},
    number =    1426,
    howpublished =  {RFC 1426},
    publisher = {RFC Editor},
    doi =       {10.17487/RFC1426},
    url =       {https://www.rfc-editor.org/info/rfc1426},
    author =    {Dave Crocker and Ned Freed and Dr. John C. Klensin and Dr. Marshall T. Rose and Einar A. Stefferud},
    title =     {{SMTP Service Extension for 8bit-MIMEtransport}},
    pagetotal = 6,
    year =      1993,
    month =     feb,
    abstract =  {This memo defines an extension to the SMTP service whereby an SMTP content body containing octets outside of the US ASCII octet range (hex 00-7F) may be relayed using SMTP.},
}