%% You should probably cite rfc4146 instead of this I-D.
@techreport{gellens-notify-mail-02,
    number =    {draft-gellens-notify-mail-02},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-gellens-notify-mail/02/},
    author =    {Randall Gellens},
    title =     {{Simple New Mail Notification}},
    pagetotal = 5,
    year =      2005,
    month =     jan,
    day =       21,
    abstract =  {This memo documents a long-standing technique, supported by a large number of mail servers, which allows users to be notified of new mail. In addition to server support, there are a number of clients that support this, ranging from full email clients to specialized clients whose only purpose is to receive new mail notifications and alert a mail client. In brief, the server sends the string "nm\_notifyuser" CRLF to the finger port on the IP address (either configured or last used) of the user who has received new mail. This memo provides information for the Internet community.},
}