Auth Posture — Email Deliverability & Spoofability Audit

Official1 tool

by auth-posture

One-call domain audit: MX receiving, SPF/DMARC/DKIM spoofing protection, disposable-address risk.

This MCP server performs a one-call domain audit covering MX receiving checks and SPF, DMARC, and DKIM spoofing protection. It also evaluates disposable-address risk, producing a summarized result based on the server’s audit scope.

🛠️ Key Features

One-call domain audit
MX receiving validation
SPF spoofing protection checks
DMARC spoofing protection checks
DKIM spoofing protection checks
Disposable-address risk assessment

🚀 Use Cases

Assess email receiving configuration via MX checks
Review DNS-based authentication posture for spoofing protection (SPF/DMARC/DKIM)
Identify disposable-address risk for domains

⚡ Developer Benefits

Single request workflow for audit coverage
Focused outputs aligned to MX receiving and spoofing protection

⚠️ Limitations

Limited to the domains explicitly covered by MX receiving, SPF/DMARC/DKIM spoofing protection, and disposable-address risk; no additional audit areas are described.

Captured live from the server via tools/list.

audit_domain

Audit an email domain in one call: can it receive mail (MX), can it be spoofed (SPF/DMARC/DKIM posture), disposable check. Returns {can_receive, can_be_spoofed, score, reasons, checks}.

Parameters1

domain

string

required

bare domain, e.g. example.com

Raw schema

{
  "type": "object",
  "properties": {
    "domain": {
      "type": "string",
      "description": "bare domain, e.g. example.com"
    }
  },
  "required": [
    "domain"
  ]
}

Install

Tools (1)

audit_domain

Remote endpoint

Streamable HTTP

Hosted server - connect over the network, no local install.

url

https://auth-posture.rowb.app/mcp

Add to VS Code Add to Cursor

claude_desktop_config.json

json

{
  "mcpServers": {
    "audit": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-remote",
        "https://auth-posture.rowb.app/mcp"
      ]
    }
  }
}

Desktop config is stdio-only; this bridges via mcp-remote. Native remote: Settings > Connectors.

🛠️ Key Features

🚀 Use Cases

⚡ Developer Benefits

⚠️ Limitations

audit_domain

Install

Remote endpoint

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