@misc{rfc1425,
    series =    {Request for Comments},
    number =    1425,
    howpublished =  {RFC 1425},
    publisher = {RFC Editor},
    doi =       {10.17487/RFC1425},
    url =       {https://www.rfc-editor.org/info/rfc1425/},
    author =    {J. Klensin and N. Freed and M. Rose and E. Stefferud and D. Crocker},
    title =     {{SMTP Service Extensions}},
    pagetotal = 10,
    year =      1993,
    month =     feb,
    abstract =  {This memo defines a framework for extending the SMTP service by defining a means whereby a server SMTP can inform a client SMTP as to the service extensions it supports. {[}STANDARDS-TRACK{]}},
}