%% You should probably cite rfc2197 instead of this I-D.
@techreport{freed-smtp-pipeline-01,
    number =    {draft-freed-smtp-pipeline-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-freed-smtp-pipeline/01/},
    author =    {Ned Freed},
    title =     {{SMTP Service Extension for Command Pipelining}},
    pagetotal = 8,
    year =      1997,
    month =     mar,
    day =       3,
    abstract =  {This memo defines an extension to the SMTP service whereby a server can indicate the extent of its ability to accept multiple commands in a single TCP send operation. {[}STANDARDS-TRACK{]}},
}