%% You should probably cite rfc6855 instead of this I-D.
@techreport{ietf-eai-5738bis-05,
    number =    {draft-ietf-eai-5738bis-05},
    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-eai-5738bis/05/},
    author =    {Pete Resnick and Chris Newman and Sean Shen},
    title =     {{IMAP Support for UTF-8}},
    pagetotal = 9,
    year =      2012,
    month =     jul,
    day =       14,
    abstract =  {This specification extends the Internet Message Access Protocol version 4rev1 (IMAP4rev1) to support UTF-8 encoded international characters in user names, mail addresses and message headers. This specification replaces RFC 5738.},
}