https://app.knowbase.one/vault/rfc/docid/1735
RFC1550: IP: Next Generation (IPng) White Paper Solicitation
Network Working Group S. Bradner Request for Comments: 1550 Harvard University Category: Informational A. Mankin NRL ...
https://app.knowbase.one/vault/rfc/docid/4228
RFC3865: A No Soliciting Simple Mail Transfer Protocol (SMTP) Service Extension
Network Working Group C. Malamud Request for Comments: 3865 Memory Palace Press Category: Standards Track September 2004 A No Soliciting Simple Mail Transfer Protocol (SMTP) ...