%% You should probably cite rfc5161 instead of this I-D.
@techreport{gulbrandsen-imap-enable-05,
    number =    {draft-gulbrandsen-imap-enable-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-gulbrandsen-imap-enable/05/},
    author =    {Alexey Melnikov and Arnt Gulbrandsen},
    title =     {{The IMAP ENABLE Extension}},
    pagetotal = 7,
    year =      2007,
    month =     dec,
    day =       16,
    abstract =  {Most IMAP extensions are used by the client when it wants to and the server supports it. However, a few extensions require the server to know whether a client supports that extension. The ENABLE extension allows an IMAP client to say which extensions it supports. {[}STANDARDS-TRACK{]}},
}