{
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  "lastModified": "2026-10-12T20:08:53.487Z",
  "sourcePath": "src/main/data/docs",
  "docId": "RFC1891",
  "document": {
    "abstract": "This memo defines an extension to the SMTP service, which allows an SMTP client to specify (a) that delivery status notifications (DSNs) should be generated under certain conditions, (b) whether such notifications should return the contents of the message, and (c) additional information, to be returned with a DSN, that allows the sender to identify both the recipient(s) for which the DSN was issued, and the transaction in which the original message was sent. [STANDARDS-TRACK]",
    "abstract$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML abstract",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc1891/",
      "updated": "2026-10-12T20:08:53.487Z",
      "version": "extractDocs.js@commit:00855ca34fe0"
    },
    "authors": [
      {
        "name": "Keith Moore"
      }
    ],
    "authors$meta": {
      "confidence": "high",
      "note": "Parsed from Datatracker doc page article:author (profile full names)",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc1891/",
      "updated": "2026-10-12T20:08:53.487Z",
      "version": "extractDocs.js@commit:00855ca34fe0"
    },
    "docId": "RFC1891",
    "docId$meta": {
      "confidence": "high",
      "note": "Derived from RFC number or Datatracker identifier",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc1891/",
      "updated": "2026-10-12T20:08:53.487Z",
      "version": "extractDocs.js@commit:00855ca34fe0"
    },
    "docLabel": "IETF RFC 1891",
    "docLabel$meta": {
      "confidence": "high",
      "note": "Constructed from provider and document identifier",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc1891/",
      "updated": "2026-10-12T20:08:53.487Z",
      "version": "extractDocs.js@commit:00855ca34fe0"
    },
    "docNumber": "1891",
    "docNumber$meta": {
      "confidence": "high",
      "note": "Parsed from RFC info page report metadata",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc1891/",
      "updated": "2026-10-12T20:08:53.487Z",
      "version": "extractDocs.js@commit:00855ca34fe0"
    },
    "docTitle": "SMTP Service Extension for Delivery Status Notifications",
    "docTitle$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML title",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc1891/",
      "updated": "2026-10-12T20:08:53.487Z",
      "version": "extractDocs.js@commit:00855ca34fe0"
    },
    "docType": "Standard",
    "docType$meta": {
      "confidence": "high",
      "note": "Mapped from Datatracker std_level or RFC status text",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc1891/",
      "updated": "2026-10-12T20:08:53.487Z",
      "version": "extractDocs.js@commit:00855ca34fe0"
    },
    "doi": "10.17487/RFC1891",
    "doi$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML doi",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc1891/",
      "updated": "2026-10-12T20:08:53.487Z",
      "version": "extractDocs.js@commit:00855ca34fe0"
    },
    "href": "https://doi.org/10.17487/RFC1891",
    "href$meta": {
      "confidence": "high",
      "note": "Derived from DOI (https://doi.org/<doi>)",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc1891/",
      "updated": "2026-10-12T20:08:53.487Z",
      "version": "extractDocs.js@commit:00855ca34fe0"
    },
    "keywords": [
      "SMTP-DSN",
      "SMTP"
    ],
    "keywords$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML keywords",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc1891/",
      "updated": "2026-10-12T20:08:53.487Z",
      "version": "extractDocs.js@commit:00855ca34fe0"
    },
    "pages": "31",
    "pages$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML page-count",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc1891/",
      "updated": "2026-10-12T20:08:53.487Z",
      "version": "extractDocs.js@commit:00855ca34fe0"
    },
    "publicationDate": "1996-01-01",
    "publicationDate$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML date",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc1891/",
      "updated": "2026-10-12T20:08:53.487Z",
      "version": "extractDocs.js@commit:00855ca34fe0"
    },
    "publisher": "IETF",
    "publisher$meta": {
      "confidence": "high",
      "note": "Static: provider",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc1891/",
      "updated": "2026-10-12T20:08:53.487Z",
      "version": "extractDocs.js@commit:00855ca34fe0"
    },
    "references": {
      "bibliographic": [
        "RFC821",
        "RFC822",
        "RFC1211",
        "RFC1651",
        "RFC1894",
        "RFC1730",
        "RFC1725",
        "RFC1892",
        "RFC1123",
        "RFC1893"
      ],
      "bibliographic$meta": {
        "confidence": "medium",
        "flag": "MIXED_REF_LAYOUT_RISK anchored=11 proseBlocks=11 skippedAnchorBlocks=10",
        "note": "Parsed from RFC HTML references/informative sections",
        "originalValue": [],
        "reviewRequired": true,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc1891/",
        "updated": "2026-10-12T20:08:53.487Z",
        "version": "extractDocs.js@commit:00855ca34fe0"
      }
    },
    "resolvedHref": "https://www.rfc-editor.org/info/rfc1891/",
    "resolvedHref$meta": {
      "confidence": "high",
      "note": "Final URL resolved via URL redirect verification",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc1891/",
      "updated": "2026-10-12T20:08:53.487Z",
      "version": "extractDocs.js@commit:00855ca34fe0"
    },
    "status": {
      "active": false,
      "active$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc1891/",
        "updated": "2026-10-12T20:08:53.487Z",
        "version": "extractDocs.js@commit:00855ca34fe0"
      },
      "errataExist": true,
      "errataExist$meta": {
        "confidence": "high",
        "note": "Derived from presence of errata links on RFC/Datatracker pages",
        "originalValue": null,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc1891/",
        "updated": "2026-10-12T20:08:53.487Z",
        "version": "extractDocs.js@commit:00855ca34fe0"
      },
      "errataUrl": [
        "https://www.rfc-editor.org/errata/rfc1891",
        "https://www.rfc-editor.org/errata_search.php?rfc=1891",
        "https://www.rfc-editor.org/rfc/inline-errata/rfc1891.html"
      ],
      "errataUrl$meta": {
        "confidence": "high",
        "note": "Parsed from errata links on RFC/Datatracker pages",
        "originalValue": [],
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc1891/",
        "updated": "2026-10-12T20:08:53.487Z",
        "version": "extractDocs.js@commit:00855ca34fe0"
      },
      "latestVersion": false,
      "latestVersion$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc1891/",
        "updated": "2026-10-12T20:08:53.487Z",
        "version": "extractDocs.js@commit:00855ca34fe0"
      },
      "statusNote": "Proposed Standard",
      "statusNote$meta": {
        "confidence": "high",
        "note": "Mapped from Datatracker doc.json std_level",
        "originalValue": null,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc1891/",
        "updated": "2026-10-12T20:08:53.487Z",
        "version": "extractDocs.js@commit:00855ca34fe0"
      },
      "superseded": true,
      "superseded$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc1891/",
        "updated": "2026-10-12T20:08:53.487Z",
        "version": "extractDocs.js@commit:00855ca34fe0"
      },
      "supersededBy": [
        "RFC3461"
      ],
      "supersededBy$meta": {
        "confidence": "high",
        "note": "Parsed from RFC index XML",
        "originalValue": [],
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc1891/",
        "updated": "2026-10-12T20:08:53.487Z",
        "version": "extractDocs.js@commit:00855ca34fe0"
      }
    }
  }
}