%% You should probably cite draft-ietf-sieve-notify-presence instead of this I-D.
@techreport{george-sieve-notify-presence-01,
    number =    {draft-george-sieve-notify-presence-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-george-sieve-notify-presence/01/},
    author =    {Robins George and Barry Leiba},
    title =     {{Sieve Notification Using Presence Information}},
    pagetotal = 8,
    year =      2010,
    month =     feb,
    day =       4,
    abstract =  {This is a further extension to the Sieve mail filtering language Notification extension, defining presence information that may be checked through the notify\_method\_capability feature.},
}