{
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    "abstract": "Notification and filtering mechanisms can make email more enjoyable on mobile and other constrained devices (such as those with limited screen sizes, memory, data transfer rates, etc.). Notifications make the client aware of significant events (such as the arrival of new mail) so it can react (such as by fetching interesting mail immediately). Filtering reduces the visible mail to a set of messages that meet some criteria for \"interesting\". This functionality is included in the goals of the Lemonade (Enhancements to Internet email to Support Diverse Service Environments) Working Group. This document also discusses the use of server-to-server notifications, and how server to server notifications fit into an architecture that provides server to client notifications. This memo provides information for the Internet community.",
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      "confidence": "high",
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      "sourceUrl": "https://www.rfc-editor.org/info/rfc5551/",
      "updated": "2026-10-16T18:55:31.827Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
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    "authors": [
      {
        "name": "Randall Gellens"
      }
    ],
    "authors$meta": {
      "confidence": "high",
      "note": "Parsed from Datatracker doc page article:author (profile full names)",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5551/",
      "updated": "2026-10-16T18:55:31.827Z",
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    "docId": "RFC5551",
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      "confidence": "high",
      "note": "Derived from RFC number or Datatracker identifier",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5551/",
      "updated": "2026-10-16T18:55:31.827Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "docLabel": "IETF RFC 5551",
    "docLabel$meta": {
      "confidence": "high",
      "note": "Constructed from provider and document identifier",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5551/",
      "updated": "2026-10-16T18:55:31.827Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
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    "docNumber": "5551",
    "docNumber$meta": {
      "confidence": "high",
      "note": "Parsed from RFC info page report metadata",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5551/",
      "updated": "2026-10-16T18:55:31.827Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "docTitle": "Lemonade Notifications Architecture",
    "docTitle$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML title",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5551/",
      "updated": "2026-10-16T18:55:31.827Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "docType": "Informational",
    "docType$meta": {
      "confidence": "high",
      "note": "Mapped from Datatracker std_level or RFC status text",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5551/",
      "updated": "2026-10-16T18:55:31.827Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "doi": "10.17487/RFC5551",
    "doi$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML doi",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5551/",
      "updated": "2026-10-16T18:55:31.827Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "href": "https://doi.org/10.17487/RFC5551",
    "href$meta": {
      "confidence": "high",
      "note": "Derived from DOI (https://doi.org/<doi>)",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5551/",
      "updated": "2026-10-16T18:55:31.827Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "pages": "12",
    "pages$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML page-count",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5551/",
      "updated": "2026-10-16T18:55:31.827Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "publicationDate": "2009-08-01",
    "publicationDate$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML date",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5551/",
      "updated": "2026-10-16T18:55:31.827Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "publisher": "IETF",
    "publisher$meta": {
      "confidence": "high",
      "note": "Static: provider",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5551/",
      "updated": "2026-10-16T18:55:31.827Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "references": {
      "bibliographic": [
        "RFC4146",
        "RFC5267",
        "RFC4551",
        "RFC5423",
        "RFC2177",
        "RFC5465",
        "RFC5442",
        "RFC5228",
        "RFC5435",
        "RFC5229",
        "RFC4467",
        "orphan/RFC5551/h:836ace20",
        "orphan/RFC5551/h:e5af517a",
        "orphan/RFC5551/h:4ddf079c"
      ],
      "bibliographic$meta": {
        "confidence": "medium",
        "flag": "MIXED_REF_LAYOUT_RISK anchored=16 proseBlocks=22 skippedAnchorBlocks=17",
        "note": "Parsed from RFC HTML references/informative sections",
        "originalValue": [],
        "reviewRequired": true,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5551/",
        "updated": "2026-10-16T18:55:31.827Z",
        "version": "extractDocs.js@commit:a6ae1efef02e"
      },
      "normative": [
        "RFC3501",
        "RFC5550"
      ],
      "normative$meta": {
        "confidence": "high",
        "note": "Parsed from RFC HTML normative references sections",
        "originalValue": [],
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5551/",
        "updated": "2026-10-16T18:55:31.827Z",
        "version": "extractDocs.js@commit:a6ae1efef02e"
      }
    },
    "resolvedHref": "https://www.rfc-editor.org/info/rfc5551/",
    "resolvedHref$meta": {
      "confidence": "high",
      "note": "Final URL resolved via URL redirect verification",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5551/",
      "updated": "2026-10-16T18:55:31.827Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
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    "status": {
      "active": true,
      "active$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5551/",
        "updated": "2026-10-16T18:55:31.827Z",
        "version": "extractDocs.js@commit:a6ae1efef02e"
      },
      "errataExist": false,
      "errataExist$meta": {
        "confidence": "high",
        "note": "Derived from presence of errata links on RFC/Datatracker pages",
        "originalValue": null,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5551/",
        "updated": "2026-10-16T18:55:31.827Z",
        "version": "extractDocs.js@commit:a6ae1efef02e"
      },
      "latestVersion": true,
      "latestVersion$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5551/",
        "updated": "2026-10-16T18:55:31.827Z",
        "version": "extractDocs.js@commit:a6ae1efef02e"
      },
      "statusNote": "Informational",
      "statusNote$meta": {
        "confidence": "high",
        "note": "Mapped from Datatracker doc.json std_level",
        "originalValue": null,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5551/",
        "updated": "2026-10-16T18:55:31.827Z",
        "version": "extractDocs.js@commit:a6ae1efef02e"
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      "superseded": false,
      "superseded$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5551/",
        "updated": "2026-10-16T18:55:31.827Z",
        "version": "extractDocs.js@commit:a6ae1efef02e"
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}