@techreport{klensin-smtp-code-registry-00,
    number =    {draft-klensin-smtp-code-registry-00},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-klensin-smtp-code-registry/00/},
    author =    {Dr. John C. Klensin},
    title =     {{An IANA Registry for Extended SMTP Status Codes}},
    pagetotal = 7,
    year =      2007,
    month =     apr,
    day =       9,
    abstract =  {The specification for enhanced mail system status codes, RFC 3463, establishes a new code model and lists a collection of codes. While it anticipated that more codes would be added over time, it did not provide an explicit mechanism for registering and tracking those codes. This document specifies an IANA registry for enhanced mail system status codes, initializing that registry with the codes so far established in published standards-track documents.},
}