postbox-tools

Check a domain (its mail-relevant IPs) or a single IP address against 24 DNS blacklists including Spamhaus ZEN, Barracuda and SpamCop. Returns per-IP listing status. Free tool by Postbox Services.

{
  "type": "object",
  "properties": {
    "target": {
      "type": "string",
      "description": "Domain (example.com) or IPv4 address to check"
    }
  },
  "required": [
    "target"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

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. Free tool by Postbox Services.

{
  "type": "object",
  "properties": {
    "domain": {
      "type": "string",
      "description": "Domain to grade, e.g. example.com"
    }
  },
  "required": [
    "domain"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

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). Free tool by Postbox Services.

{
  "type": "object",
  "properties": {
    "url": {
      "type": "string",
      "description": "Absolute http:// or https:// URL to trace"
    }
  },
  "required": [
    "url"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

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. Free tool by Postbox Services.

{
  "type": "object",
  "properties": {},
  "$schema": "http://json-schema.org/draft-07/schema#"
}

Fetch the score and breakdown of a mail test created with create_mailtest, once the user has sent their email to the disposable address.

{
  "type": "object",
  "properties": {
    "id": {
      "type": "string",
      "description": "The test id returned by create_mailtest"
    }
  },
  "required": [
    "id"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

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. Free tool by Postbox Services.

{
  "type": "object",
  "properties": {
    "eml": {
      "type": "string",
      "description": "The complete raw email source (headers + body), as exported via \"Show original\" / \"Download message\""
    }
  },
  "required": [
    "eml"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

Get a domain's registration date and age (young domains have weak sending reputation). Free tool by Postbox Services.

{
  "type": "object",
  "properties": {
    "domain": {
      "type": "string",
      "description": "Domain, e.g. example.com"
    }
  },
  "required": [
    "domain"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

WHOIS summary for a domain: registrar, created/updated/expires dates, nameservers, DNSSEC, status flags. Free tool by Postbox Services.

{
  "type": "object",
  "properties": {
    "domain": {
      "type": "string",
      "description": "Domain, e.g. example.com"
    }
  },
  "required": [
    "domain"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}