@techreport{varshavchik-verp-smtpext-01,
    number =    {draft-varshavchik-verp-smtpext-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-varshavchik-verp-smtpext/01/},
    author =    {Sam Varshavchik},
    title =     {{Variable Envelope Return Path SMTP Extension}},
    pagetotal = 11,
    year =      1999,
    month =     jul,
    day =       27,
    abstract =  {This document describes an extension to the SMTP service {[}1{]}, called Variable Envelope Return Path (VERP). The VERP extension implements a way of automatically identifying undeliverable mail recipients, even when non-delivery reports originate from mail systems that do not implement delivery status notifications as specified in {[}2{]} and {[}3{]}.},
}