@misc{rfc3865,
    series =    {Request for Comments},
    number =    3865,
    howpublished =  {RFC 3865},
    publisher = {RFC Editor},
    doi =       {10.17487/RFC3865},
    url =       {https://www.rfc-editor.org/info/rfc3865},
    author =    {Carl Malamud},
    title =     {{A No Soliciting Simple Mail Transfer Protocol (SMTP) Service Extension}},
    pagetotal = 19,
    year =      2004,
    month =     sep,
    abstract =  {This document proposes an extension to Soliciting Simple Mail Transfer Protocol (SMTP) for an electronic mail equivalent to the real-world "No Soliciting" sign. In addition to the service extension, a new message header and extensions to the existing "received" message header are described. {[}STANDARDS-TRACK{]}},
}