{
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    "abstract": "This document defines an algorithm by which, given an e-mail message, one can extract the identity of the party that appears to have most proximately caused that message to be delivered. This identity is called the Purported Responsible Address (PRA).This memo defines an Experimental Protocol for the Internet community.",
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      "confidence": "high",
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      "updated": "2026-10-16T15:45:55.110Z",
      "version": "extractDocs.js@commit:e0fe4a71cd26"
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    "authors": [
      {
        "name": "Jim Lyon"
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      "confidence": "high",
      "note": "Parsed from Datatracker doc page article:author (profile full names)",
      "originalValue": null,
      "source": "parsed",
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      "updated": "2026-10-16T15:45:55.110Z",
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    "docId": "RFC4407",
    "docId$meta": {
      "confidence": "high",
      "note": "Derived from RFC number or Datatracker identifier",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4407/",
      "updated": "2026-10-16T15:45:55.110Z",
      "version": "extractDocs.js@commit:e0fe4a71cd26"
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    "docLabel": "IETF RFC 4407",
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      "confidence": "high",
      "note": "Constructed from provider and document identifier",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4407/",
      "updated": "2026-10-16T15:45:55.110Z",
      "version": "extractDocs.js@commit:e0fe4a71cd26"
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    "docNumber": "4407",
    "docNumber$meta": {
      "confidence": "high",
      "note": "Parsed from RFC info page report metadata",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4407/",
      "updated": "2026-10-16T15:45:55.110Z",
      "version": "extractDocs.js@commit:e0fe4a71cd26"
    },
    "docTitle": "Purported Responsible Address in E-Mail Messages",
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      "confidence": "high",
      "note": "Parsed from RFC index XML title",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4407/",
      "updated": "2026-10-16T15:45:55.110Z",
      "version": "extractDocs.js@commit:e0fe4a71cd26"
    },
    "docType": "Specification",
    "docType$meta": {
      "confidence": "high",
      "note": "Mapped from Datatracker std_level or RFC status text",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4407/",
      "updated": "2026-10-16T15:45:55.110Z",
      "version": "extractDocs.js@commit:e0fe4a71cd26"
    },
    "doi": "10.17487/RFC4407",
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      "confidence": "high",
      "note": "Parsed from RFC index XML doi",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4407/",
      "updated": "2026-10-16T15:45:55.110Z",
      "version": "extractDocs.js@commit:e0fe4a71cd26"
    },
    "href": "https://doi.org/10.17487/RFC4407",
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      "confidence": "high",
      "note": "Derived from DOI (https://doi.org/<doi>)",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4407/",
      "updated": "2026-10-16T15:45:55.110Z",
      "version": "extractDocs.js@commit:e0fe4a71cd26"
    },
    "keywords": [
      "Purported Responsible Address"
    ],
    "keywords$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML keywords",
      "originalValue": [
        "Pra",
        "Purported Responsible Address"
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      "overridden": true,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4407/",
      "updated": "2026-10-16T16:57:49.636Z",
      "version": "extractDocs.js@commit:30d92d8ed083"
    },
    "pages": "7",
    "pages$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML page-count",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4407/",
      "updated": "2026-10-16T15:45:55.110Z",
      "version": "extractDocs.js@commit:e0fe4a71cd26"
    },
    "publicationDate": "2006-04-01",
    "publicationDate$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML date",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4407/",
      "updated": "2026-10-16T15:45:55.110Z",
      "version": "extractDocs.js@commit:e0fe4a71cd26"
    },
    "publisher": "IETF",
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      "confidence": "high",
      "note": "Static: provider",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4407/",
      "updated": "2026-10-16T15:45:55.110Z",
      "version": "extractDocs.js@commit:e0fe4a71cd26"
    },
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      "bibliographic": [
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        "orphan/RFC4407/h:6516b02a"
      ],
      "bibliographic$meta": {
        "confidence": "medium",
        "flag": "MIXED_REF_LAYOUT_RISK anchored=4 proseBlocks=7 skippedAnchorBlocks=5",
        "note": "Parsed from RFC HTML references/informative sections",
        "originalValue": [],
        "reviewRequired": true,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc4407/",
        "updated": "2026-10-16T15:45:55.110Z",
        "version": "extractDocs.js@commit:e0fe4a71cd26"
      },
      "normative": [
        "RFC2119",
        "RFC2822"
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      "normative$meta": {
        "confidence": "high",
        "note": "Parsed from RFC HTML normative references sections",
        "originalValue": [],
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc4407/",
        "updated": "2026-10-16T15:45:55.110Z",
        "version": "extractDocs.js@commit:e0fe4a71cd26"
      }
    },
    "resolvedHref": "https://www.rfc-editor.org/info/rfc4407/",
    "resolvedHref$meta": {
      "confidence": "high",
      "note": "Final URL resolved via URL redirect verification",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4407/",
      "updated": "2026-10-16T15:45:55.110Z",
      "version": "extractDocs.js@commit:e0fe4a71cd26"
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      "active": true,
      "active$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc4407/",
        "updated": "2026-10-16T15:45:55.110Z",
        "version": "extractDocs.js@commit:e0fe4a71cd26"
      },
      "errataExist": true,
      "errataExist$meta": {
        "confidence": "high",
        "note": "Derived from presence of errata links on RFC/Datatracker pages",
        "originalValue": null,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc4407/",
        "updated": "2026-10-16T15:45:55.110Z",
        "version": "extractDocs.js@commit:e0fe4a71cd26"
      },
      "errataUrl": [
        "https://www.rfc-editor.org/errata/rfc4407",
        "https://www.rfc-editor.org/errata_search.php?rfc=4407"
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      "errataUrl$meta": {
        "confidence": "high",
        "note": "Parsed from errata links on RFC/Datatracker pages",
        "originalValue": [],
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc4407/",
        "updated": "2026-10-16T15:45:55.110Z",
        "version": "extractDocs.js@commit:e0fe4a71cd26"
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      "latestVersion": true,
      "latestVersion$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc4407/",
        "updated": "2026-10-16T15:45:55.110Z",
        "version": "extractDocs.js@commit:e0fe4a71cd26"
      },
      "statusNote": "Historic",
      "statusNote$meta": {
        "confidence": "high",
        "note": "Mapped from Datatracker doc.json std_level",
        "originalValue": null,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc4407/",
        "updated": "2026-10-16T15:45:55.110Z",
        "version": "extractDocs.js@commit:e0fe4a71cd26"
      },
      "superseded": false,
      "superseded$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc4407/",
        "updated": "2026-10-16T15:45:55.110Z",
        "version": "extractDocs.js@commit:e0fe4a71cd26"
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}