{
  "draft": "draft-motonori-dualstack-smtp-requirement-01",
  "doc_id": "RFC3974",
  "title": "SMTP Operational Experience in Mixed IPv4/v6 Environments",
  "authors": [
    "M. Nakamura",
    "J. Hagino"
  ],
  "format": [
    "TEXT",
    "HTML"
  ],
  "page_count": "10",
  "pub_status": "INFORMATIONAL",
  "status": "INFORMATIONAL",
  "source": "INDEPENDENT",
  "abstract": "This document discusses SMTP operational experiences in IPv4/v6 dual stack environments. As IPv6-capable SMTP servers are deployed, it has become apparent that certain configurations of MX records are necessary for stable dual-stack (IPv4 and IPv6) SMTP operation. This document clarifies the existing problems in the transition period between IPv4 SMTP and IPv6 SMTP. It also defines operational requirements for stable IPv4/v6 SMTP operation.\n\n This document does not define any new protocol. This memo provides information for the Internet community.",
  "pub_date": "January 2005",
  "keywords": [
    "simple mail transfer protocol",
    "dual stack",
    "dualstack",
    "ipv4",
    "ipv6"
  ],
  "obsoletes": [],
  "obsoleted_by": [],
  "updates": [],
  "updated_by": [],
  "see_also": [],
  "doi": "10.17487/RFC3974",
  "errata_url": null
}