%% You should probably cite rfc1426 instead of this I-D.
@techreport{ietf-smtpext-8bit-mime-01,
    number =    {draft-ietf-smtpext-8bit-mime-01},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-ietf-smtpext-8bit-mime/01/},
    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 =      ,
    month =     ,
    day =       ,
    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.},
}