%% You should probably cite rfc9477 instead of this I-D.
@techreport{benecke-cfbl-address-header-04,
    number =    {draft-benecke-cfbl-address-header-04},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-benecke-cfbl-address-header/04/},
    author =    {Jan-Philipp Benecke},
    title =     {{Complaint Feedback Loop Address Header}},
    pagetotal = 15,
    year =      2021,
    month =     oct,
    day =       22,
    abstract =  {This document describes a method to allow a mail sender to specify a complaint feedback loop address as an email header and how a mail receiver can use it. This document also defines the rules for processing and forwarding such a complaint. The motivation for this arises out of the absence of a standardized and automated way to provide a complaint feedback loop address to mailbox providers. Currently, providing and maintaining such an address is a manual to a time-consuming process for mail senders and mailbox providers.},
}