Server definition

Hash: sha256:0d1d085e628dd4c4f2ad63927d38611a42478aa865a437cf1aabb571458659ba
What it is: What a remote MCP server returned when asked what it offers: 8 tools

The blob, as servednamed by its sha256

{
  "instructions": "Free email deliverability and security checks by Postbox Services: check whether a domain or IP is on an email blacklist (DNSBL), grade a domain's spoofing/BEC exposure (SPF, DKIM, DMARC), trace a URL's redirect chain, run a full deliverability/spam test on a real message, analyze a raw .eml, and look up domain age and WHOIS. Each tool checks the exact target given and returns structured results plus a link to the full web report.",
  "tools": [
    {
      "description": "Run a deliverability/content analysis on a raw RFC 822 email (.eml source: full headers + body). IMPORTANT LIMITS: with no live SMTP session, SPF, blacklist and reverse-DNS cannot be verified from a file - for the authoritative score use create_mailtest instead.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "additionalProperties": false,
        "properties": {
          "eml": {
            "description": "The complete raw email source (headers + body), as exported via \"Show original\" / \"Download message\"",
            "type": "string"
          }
        },
        "required": [
          "eml"
        ],
        "type": "object"
      },
      "name": "analyze_eml",
      "outputSchema": null
    },
    {
      "description": "Check a domain against domain blacklists (Spamhaus DBL, SURBL, URIBL and others), or an IP address against 24 IP blacklists including Spamhaus ZEN, Barracuda and SpamCop. Checks the exact target given: domains are not resolved to IPs. Returns per-list listing status.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "additionalProperties": false,
        "properties": {
          "target": {
            "description": "IPv4 address (checked against IP blacklists) or domain (checked against domain blacklists)",
            "type": "string"
          }
        },
        "required": [
          "target"
        ],
        "type": "object"
      },
      "name": "check_blacklist",
      "outputSchema": null
    },
    {
      "description": "Grade how exposed a domain is to email spoofing and business email compromise, from its public DNS (SPF, DMARC policy strength, alignment, live lookalike domains). Returns an A-F grade with findings.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "additionalProperties": false,
        "properties": {
          "domain": {
            "description": "Domain to grade, e.g. example.com",
            "type": "string"
          }
        },
        "required": [
          "domain"
        ],
        "type": "object"
      },
      "name": "check_spoofability",
      "outputSchema": null
    },
    {
      "description": "Create a disposable test address for a full email deliverability audit (score /10: SPF, DKIM, DMARC + alignment, blacklists, reverse DNS, SpamAssassin content, Gmail/Yahoo bulk-sender compliance). The USER must then send an email from the system they want to test to the returned address, after which get_mailtest_result returns the score.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "properties": {},
        "type": "object"
      },
      "name": "create_mailtest",
      "outputSchema": null
    },
    {
      "description": "Get a domain's registration date and age (young domains have weak sending reputation).",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "additionalProperties": false,
        "properties": {
          "domain": {
            "description": "Domain, e.g. example.com",
            "type": "string"
          }
        },
        "required": [
          "domain"
        ],
        "type": "object"
      },
      "name": "get_domain_age",
      "outputSchema": null
    },
    {
      "description": "Fetch the score and breakdown of a mail test created with create_mailtest, once the user has sent their email to the disposable address.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "additionalProperties": false,
        "properties": {
          "id": {
            "description": "The test id returned by create_mailtest",
            "type": "string"
          }
        },
        "required": [
          "id"
        ],
        "type": "object"
      },
      "name": "get_mailtest_result",
      "outputSchema": null
    },
    {
      "description": "Follow a URL server-side through every HTTP redirect hop to its real final destination - per-hop status, IP, TLS and timing, plus phishing/deliverability flags (cross-domain jumps, https downgrades, meta/JS redirects). Fetching is SSRF-hardened (private ranges blocked, HTTPS-only, per-hop validation); how it works: https://redirect.postboxservices.com/",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "additionalProperties": false,
        "properties": {
          "url": {
            "description": "Absolute http:// or https:// URL to trace",
            "type": "string"
          }
        },
        "required": [
          "url"
        ],
        "type": "object"
      },
      "name": "trace_redirect",
      "outputSchema": null
    },
    {
      "description": "WHOIS summary for a domain: registrar, created/updated/expires dates, nameservers, DNSSEC, status flags.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "additionalProperties": false,
        "properties": {
          "domain": {
            "description": "Domain, e.g. example.com",
            "type": "string"
          }
        },
        "required": [
          "domain"
        ],
        "type": "object"
      },
      "name": "whois_lookup",
      "outputSchema": null
    }
  ]
}

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