{
  "draft": "draft-ietf-uta-mta-sts-21",
  "doc_id": "RFC8461",
  "title": "SMTP MTA Strict Transport Security (MTA-STS)",
  "authors": [
    "D. Margolis",
    "M. Risher",
    "B. Ramakrishnan",
    "A. Brotman",
    "J. Jones"
  ],
  "format": [
    "TEXT",
    "HTML"
  ],
  "page_count": "29",
  "pub_status": "PROPOSED STANDARD",
  "status": "PROPOSED STANDARD",
  "source": "Using TLS in Applications",
  "abstract": "SMTP MTA Strict Transport Security (MTA-STS) is a mechanism enabling mail service providers (SPs) to declare their ability to receive Transport Layer Security (TLS) secure SMTP connections and to specify whether sending SMTP servers should refuse to deliver to MX hosts that do not offer TLS with a trusted server certificate.",
  "pub_date": "September 2018",
  "keywords": [
    "SMTP STARTTLS",
    "Mail Security"
  ],
  "obsoletes": [],
  "obsoleted_by": [],
  "updates": [],
  "updated_by": [],
  "see_also": [],
  "doi": "10.17487/RFC8461",
  "errata_url": "https://www.rfc-editor.org/errata/rfc8461"
}