%% You should probably cite rfc4407 instead of this I-D.
@techreport{lyon-senderid-pra-01,
    number =    {draft-lyon-senderid-pra-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-lyon-senderid-pra/01/},
    author =    {Jim Lyon},
    title =     {{Purported Responsible Address in E-Mail Messages}},
    pagetotal = 7,
    year =      2005,
    month =     may,
    day =       19,
    abstract =  {This document defines an algorithm by which, given an e-mail message, one can extract the identity of the party that appears to have most proximately caused that message to be delivered. This identity is called the Purported Responsible Address (PRA).This memo defines an Experimental Protocol for the Internet community.},
}