@misc{rfc6531,
    series =    {Request for Comments},
    number =    6531,
    howpublished =  {RFC 6531},
    publisher = {RFC Editor},
    doi =       {10.17487/RFC6531},
    url =       {https://www.rfc-editor.org/info/rfc6531},
    author =    {Wei MAO and Jiankang Yao},
    title =     {{SMTP Extension for Internationalized Email}},
    pagetotal = 18,
    year =      2012,
    month =     feb,
    abstract =  {This document specifies an SMTP extension for transport and delivery of email messages with internationalized email addresses or header information. {[}STANDARDS-TRACK{]}},
}