{
  "title": "Email header analyzer",
  "human_url": "https://happytails.ai/en/email-tools/email-header-analyzer/",
  "agent_url": "https://happytails.ai/agents/en/email-tools/email-header-analyzer/",
  "language": "en",
  "markdown_url": "https://happytails.ai/en/email-tools/email-header-analyzer.md",
  "content": "Email header analyzer\nLocal parsing of hops and authentication results.\nUseful next steps\nSPF checker\nDNS lookups, include-chain limits and findings.\nDKIM checker\nDomain plus selector lookup.\nDMARC checker\nParse policy, reporting addresses and inheritance.\nHow to use Email header analyzer\nEnter your text in the input field.\nReview the settings, then choose Run Email header analyzer.\nReview the result, then use Copy result or a download link when available.\nWorking with email header analyzer\nEmail tools can inspect addresses, message headers, templates and domain configuration. These tasks answer different questions: a syntactically valid address is not the same as a mailbox that exists, and a configured domain is not a guarantee of inbox placement.\nCommon questions\nDoes address validation prove a mailbox exists?\nSyntax checks can catch formatting mistakes but cannot prove that a person receives mail at an address. Server-side checks can also be inconclusive.\nDo authentication records guarantee inbox delivery?\nNo. Authentication is one signal among several. Sending behavior, recipient engagement and filtering rules also affect what happens to a message.\nContinue your workflow:\nSPF checker\n,\nDKIM checker\n,\nDMARC checker\n.",
  "content_format": "text/plain",
  "visibility": "public",
  "links": [
    {
      "name": "SPF checker DNS lookups, include-chain limits and findings.",
      "url": "https://happytails.ai/en/email-tools/spf-checker/"
    },
    {
      "name": "DKIM checker Domain plus selector lookup.",
      "url": "https://happytails.ai/en/email-tools/dkim-checker/"
    },
    {
      "name": "DMARC checker Parse policy, reporting addresses and inheritance.",
      "url": "https://happytails.ai/en/email-tools/dmarc-checker/"
    }
  ],
  "tool": {
    "id": "email-header-analyzer",
    "category": "email-tools",
    "built": true,
    "requirements": "Local parsing of hops and authentication results; distinguish reported versus independently verified claims.",
    "implementation": {
      "fields": [],
      "experience": {
        "automatic": false,
        "single": false,
        "label": "Your text",
        "placeholder": "Type or paste your input…",
        "help": "Up to 1,000,000 characters. Review the settings before running.",
        "action": null
      },
      "mode": "explicit",
      "interactive": false
    },
    "execution": "POST /api/v1/tools/email-header-analyzer/run",
    "api": {
      "id": "email-header-analyzer",
      "name": "Email header analyzer",
      "category": "email-tools",
      "description": "Local parsing of hops and authentication results.",
      "notes": "",
      "human_path": "/en/email-tools/email-header-analyzer/",
      "method": "POST",
      "endpoint": "/api/v1/tools/email-header-analyzer/run",
      "schema_url": "/api/v1/tools/email-header-analyzer",
      "input_schema": {
        "type": "object",
        "additionalProperties": false,
        "properties": {
          "input": {
            "type": "string",
            "maxLength": 1000000,
            "default": "",
            "description": "Plain text input. File tools use files instead unless otherwise documented."
          },
          "options": {
            "type": "object",
            "additionalProperties": false,
            "properties": {}
          }
        }
      },
      "output_schema": {
        "type": "object",
        "required": [
          "tool",
          "result"
        ],
        "properties": {
          "tool": {
            "type": "string"
          },
          "result": {
            "type": "object",
            "required": [
              "text",
              "files"
            ],
            "properties": {
              "text": {
                "type": [
                  "string",
                  "null"
                ]
              },
              "data": {
                "description": "Parsed JSON when the textual result is JSON."
              },
              "name": {
                "type": "string"
              },
              "mime": {
                "type": "string"
              },
              "files": {
                "type": "array",
                "items": {
                  "type": "object",
                  "required": [
                    "name",
                    "mime",
                    "bytes",
                    "base64"
                  ],
                  "properties": {
                    "name": {
                      "type": "string"
                    },
                    "mime": {
                      "type": "string"
                    },
                    "bytes": {
                      "type": "integer"
                    },
                    "base64": {
                      "type": "string",
                      "contentEncoding": "base64"
                    }
                  }
                }
              }
            }
          }
        }
      },
      "processing": "Server; same transformation code as browser tools",
      "limits": {
        "request_bytes": 8388608,
        "input_characters": 1000000,
        "files_bytes": 5242880,
        "max_files": 0,
        "timeout_seconds": 12
      }
    },
    "agent_processing": "Server; same transformation code as browser tools",
    "browser_agent": {
      "supported": true,
      "name": "run_current_tool",
      "discovery": "WebMCP on the human page in a supporting browser",
      "verification": "See audit/API-AUDIT.md; availability is not verification"
    }
  },
  "markdown": "# Email header analyzer\n\n- Human page: https://happytails.ai/en/email-tools/email-header-analyzer/\n- Markdown: https://happytails.ai/en/email-tools/email-header-analyzer.md\n- Structured JSON: https://happytails.ai/agents/en/email-tools/email-header-analyzer/index.json\n- Visibility: public\n\n## Tool capabilities\n\n| Property | Value |\n| --- | --- |\n| Tool ID | `email-header-analyzer` |\n| Category | email-tools |\n| Implementation | Registered implementation. Registration alone is not a production-quality guarantee. |\n| Browser execution | Use the visible action or interactive controls. |\n| Browser processing | Browser; see tool notes for network behavior. |\n| HTTP API | /api/v1/tools/email-header-analyzer/run |\n| Browser-agent interface | run_current_tool |\n\n### Inputs and settings\n\nText input: Your text.\n\nExample or placeholder shown in the interface (not a validated fixture):\n\n```text\nType or paste your input…\n```\n\nUp to 1,000,000 characters. Review the settings before running.\n\nNo additional settings are declared for this tool.\n\n### HTTP contract\n\nAPI calls process supplied data on the server. The website origin is `https://happytails.ai`. Server API hosting is not connected on the public website yet. Use your local server origin to test these requests.\n\n```http\nPOST https://happytails.ai/api/v1/tools/email-header-analyzer/run\nContent-Type: application/json\n```\n\n[Detailed operation reference](https://happytails.ai/en/api/tools/email-header-analyzer.md) · [Shared API guide](https://happytails.ai/en/api.md)\n\n#### Limits\n\n| Limit | Value |\n| --- | --- |\n| request_bytes | 8388608 |\n| input_characters | 1000000 |\n| files_bytes | 5242880 |\n| max_files | 0 |\n| timeout_seconds | 12 |\n\n#### Complete input schema\n\n```json\n{\n  \"type\": \"object\",\n  \"additionalProperties\": false,\n  \"properties\": {\n    \"input\": {\n      \"type\": \"string\",\n      \"maxLength\": 1000000,\n      \"default\": \"\",\n      \"description\": \"Plain text input. File tools use files instead unless otherwise documented.\"\n    },\n    \"options\": {\n      \"type\": \"object\",\n      \"additionalProperties\": false,\n      \"properties\": {}\n    }\n  }\n}\n```\n\n#### Complete output schema\n\n```json\n{\n  \"type\": \"object\",\n  \"required\": [\n    \"tool\",\n    \"result\"\n  ],\n  \"properties\": {\n    \"tool\": {\n      \"type\": \"string\"\n    },\n    \"result\": {\n      \"type\": \"object\",\n      \"required\": [\n        \"text\",\n        \"files\"\n      ],\n      \"properties\": {\n        \"text\": {\n          \"type\": [\n            \"string\",\n            \"null\"\n          ]\n        },\n        \"data\": {\n          \"description\": \"Parsed JSON when the textual result is JSON.\"\n        },\n        \"name\": {\n          \"type\": \"string\"\n        },\n        \"mime\": {\n          \"type\": \"string\"\n        },\n        \"files\": {\n          \"type\": \"array\",\n          \"items\": {\n            \"type\": \"object\",\n            \"required\": [\n              \"name\",\n              \"mime\",\n              \"bytes\",\n              \"base64\"\n            ],\n            \"properties\": {\n              \"name\": {\n                \"type\": \"string\"\n              },\n              \"mime\": {\n                \"type\": \"string\"\n              },\n              \"bytes\": {\n                \"type\": \"integer\"\n              },\n              \"base64\": {\n                \"type\": \"string\",\n                \"contentEncoding\": \"base64\"\n              }\n            }\n          }\n        }\n      }\n    }\n  }\n}\n```\n\n#### Error and retry handling\n\nFailures return a non-200 status and `error.code` plus `error.message`. Correct invalid input before retrying; retry server-busy responses with bounded backoff. Returned files contain Base64 data, not persistent download URLs. Decode and inspect the output before treating conversion as successful. See the shared API guide for the complete status and timeout rules.\n\n### Browser-agent workflow\n\n1. Open the human page in a browser that supports WebMCP.\n2. Discover the interface exposed by that page; use its actual schema.\n3. Select files on the page first when the tool requires files.\n4. Call `run_current_tool` with valid input and settings.\n5. Inspect the returned result or error and the displayed output. Retrieve files from the displayed download links.\n\nCalls do not automatically copy or download results. Browser permissions still apply. Interface availability alone is not proof of successful execution.\n\n### Planning specification\n\nLocal parsing of hops and authentication results; distinguish reported versus independently verified claims.\n\nThis describes intended requirements. Use the implementation notes, interface schema and observed output to determine current support.\n\n### Complete machine-readable capability record\n\n```json\n{\n  \"id\": \"email-header-analyzer\",\n  \"category\": \"email-tools\",\n  \"built\": true,\n  \"requirements\": \"Local parsing of hops and authentication results; distinguish reported versus independently verified claims.\",\n  \"implementation\": {\n    \"fields\": [],\n    \"experience\": {\n      \"automatic\": false,\n      \"single\": false,\n      \"label\": \"Your text\",\n      \"placeholder\": \"Type or paste your input…\",\n      \"help\": \"Up to 1,000,000 characters. Review the settings before running.\",\n      \"action\": null\n    },\n    \"mode\": \"explicit\",\n    \"interactive\": false\n  },\n  \"execution\": \"POST /api/v1/tools/email-header-analyzer/run\",\n  \"api\": {\n    \"id\": \"email-header-analyzer\",\n    \"name\": \"Email header analyzer\",\n    \"category\": \"email-tools\",\n    \"description\": \"Local parsing of hops and authentication results.\",\n    \"notes\": \"\",\n    \"human_path\": \"/en/email-tools/email-header-analyzer/\",\n    \"method\": \"POST\",\n    \"endpoint\": \"/api/v1/tools/email-header-analyzer/run\",\n    \"schema_url\": \"/api/v1/tools/email-header-analyzer\",\n    \"input_schema\": {\n      \"type\": \"object\",\n      \"additionalProperties\": false,\n      \"properties\": {\n        \"input\": {\n          \"type\": \"string\",\n          \"maxLength\": 1000000,\n          \"default\": \"\",\n          \"description\": \"Plain text input. File tools use files instead unless otherwise documented.\"\n        },\n        \"options\": {\n          \"type\": \"object\",\n          \"additionalProperties\": false,\n          \"properties\": {}\n        }\n      }\n    },\n    \"output_schema\": {\n      \"type\": \"object\",\n      \"required\": [\n        \"tool\",\n        \"result\"\n      ],\n      \"properties\": {\n        \"tool\": {\n          \"type\": \"string\"\n        },\n        \"result\": {\n          \"type\": \"object\",\n          \"required\": [\n            \"text\",\n            \"files\"\n          ],\n          \"properties\": {\n            \"text\": {\n              \"type\": [\n                \"string\",\n                \"null\"\n              ]\n            },\n            \"data\": {\n              \"description\": \"Parsed JSON when the textual result is JSON.\"\n            },\n            \"name\": {\n              \"type\": \"string\"\n            },\n            \"mime\": {\n              \"type\": \"string\"\n            },\n            \"files\": {\n              \"type\": \"array\",\n              \"items\": {\n                \"type\": \"object\",\n                \"required\": [\n                  \"name\",\n                  \"mime\",\n                  \"bytes\",\n                  \"base64\"\n                ],\n                \"properties\": {\n                  \"name\": {\n                    \"type\": \"string\"\n                  },\n                  \"mime\": {\n                    \"type\": \"string\"\n                  },\n                  \"bytes\": {\n                    \"type\": \"integer\"\n                  },\n                  \"base64\": {\n                    \"type\": \"string\",\n                    \"contentEncoding\": \"base64\"\n                  }\n                }\n              }\n            }\n          }\n        }\n      }\n    },\n    \"processing\": \"Server; same transformation code as browser tools\",\n    \"limits\": {\n      \"request_bytes\": 8388608,\n      \"input_characters\": 1000000,\n      \"files_bytes\": 5242880,\n      \"max_files\": 0,\n      \"timeout_seconds\": 12\n    }\n  },\n  \"agent_processing\": \"Server; same transformation code as browser tools\",\n  \"browser_agent\": {\n    \"supported\": true,\n    \"name\": \"run_current_tool\",\n    \"discovery\": \"WebMCP on the human page in a supporting browser\",\n    \"verification\": \"See audit/API-AUDIT.md; availability is not verification\"\n  }\n}\n```\n\n## Page guide\n\nLocal parsing of hops and authentication results.\n\n## Useful next steps\n\n- [SPF checker](https://happytails.ai/en/email-tools/spf-checker/): DNS lookups, include-chain limits and findings. ([Markdown](https://happytails.ai/en/email-tools/spf-checker.md))\n\n- [DKIM checker](https://happytails.ai/en/email-tools/dkim-checker/): Domain plus selector lookup. ([Markdown](https://happytails.ai/en/email-tools/dkim-checker.md))\n\n- [DMARC checker](https://happytails.ai/en/email-tools/dmarc-checker/): Parse policy, reporting addresses and inheritance. ([Markdown](https://happytails.ai/en/email-tools/dmarc-checker.md))\n\n## How to use Email header analyzer\n\n1. Enter your text in the input field.\n2. Review the settings, then choose Run Email header analyzer.\n3. Review the result, then use Copy result or a download link when available.\n\n## Working with email header analyzer\n\nEmail tools can inspect addresses, message headers, templates and domain configuration. These tasks answer different questions: a syntactically valid address is not the same as a mailbox that exists, and a configured domain is not a guarantee of inbox placement.\n\n## Common questions\n\n### Does address validation prove a mailbox exists?\n\nSyntax checks can catch formatting mistakes but cannot prove that a person receives mail at an address. Server-side checks can also be inconclusive.\n\n### Do authentication records guarantee inbox delivery?\n\nNo. Authentication is one signal among several. Sending behavior, recipient engagement and filtering rules also affect what happens to a message.\n\nContinue your workflow: [SPF checker](https://happytails.ai/en/email-tools/spf-checker/), [DKIM checker](https://happytails.ai/en/email-tools/dkim-checker/), [DMARC checker](https://happytails.ai/en/email-tools/dmarc-checker/).\n"
}