Security & Testing

themailx.com

Checks and generates DNS records for email authentication protocols (SPF, DKIM, DMARC, BIMI).

1 endpoint16 known toolsFirst detected May 11, 2026Last detected August 29, 2026

ENDPOINT 1

https://themailx.com/mcp

No auth detected

MCP server metadata

Name: mailx-deliverability
Version: 1.0.0

Capabilities

tools.listChangedresourcesprompts

Server instructions

Email deliverability tools for AI agents. Check SPF, DKIM, DMARC, BIMI, blacklists, SMTP/IMAP connectivity, and generate DNS records.

Known tools 16

spf_check

Check if a domain has a valid SPF (Sender Policy Framework) DNS record.

Inferred read-only

dkim_check

Check if a domain has a valid DKIM (DomainKeys Identified Mail) DNS record for a given selector.

Inferred read-only

dmarc_check

Check if a domain has a valid DMARC (Domain-based Message Authentication, Reporting & Conformance) DNS record.

Potential side effects

bimi_check

Check if a domain has a valid BIMI (Brand Indicators for Message Identification) DNS record.

Potential side effects

dmarc_generate

Generate a DMARC DNS record for a domain.

Inferred read-only

spf_generate

Generate an SPF DNS record for a domain based on the email provider being used.

Potential side effects

smtp_check

Test an SMTP server connection by attempting to connect and authenticate.

Inferred read-only

imap_check

Test an IMAP server connection by attempting to connect and authenticate.

Inferred read-only

smtp_finder

Look up SMTP server settings (host, port, encryption) for a given email provider.

Potential side effects

imap_finder

Look up IMAP server settings (host, port, encryption) for a given email provider.

Potential side effects

blacklist_check

Check if a domain or IP address is listed in popular email blacklists (DNSBLs).

Potential side effects

mx_lookup

Look up MX (Mail Exchanger) records for a domain.

Inferred read-only

txt_lookup

Look up all TXT records for a domain.

Inferred read-only

cname_lookup

Look up CNAME (Canonical Name) records for a domain.

Inferred read-only

ptr_lookup

Reverse DNS lookup.

Inferred read-only

dns_lookup

Look up all DNS records for a domain in one query.

Inferred read-only

CONNECT WITH APPROVAL

Client installation

Review this server and its permissions before adding it. Secret placeholders must be set locally.

Codex

~/.codex/config.toml

[mcp_servers.mailx-deliverability]
url = "https://themailx.com/mcp"
enabled = true

Claude Code

.mcp.json

{
  "mcpServers": {
    "mailx-deliverability": {
      "type": "http",
      "url": "https://themailx.com/mcp"
    }
  }
}

Claude Desktop

Settings → Connectors → Add custom connector

Name: mailx-deliverability
Remote MCP URL: https://themailx.com/mcp

Add this remote URL as a custom connector in Claude Desktop. Availability depends on the user plan and workspace policy.

Cursor

.cursor/mcp.json

{
  "mcpServers": {
    "mailx-deliverability": {
      "url": "https://themailx.com/mcp"
    }
  }
}

Visual Studio Code

.vscode/mcp.json

Add to Visual Studio Code

{
  "servers": {
    "mailx-deliverability": {
      "type": "http",
      "url": "https://themailx.com/mcp"
    }
  }
}

Generic MCP

Client-specific MCP configuration

{
  "name": "mailx-deliverability",
  "transport": "streamable-http",
  "url": "https://themailx.com/mcp"
}

MCP Inspector

Run the official MCP Inspector locally and enter the indexed Streamable HTTP endpoint.

TRUST AND VERIFICATION EVIDENCE

Loading Trust v2 evidence…

Checking the associated registrable domain. The BuiltWith key remains server-side.

Indexed

Evidence is source-attributed and does not guarantee that a third-party server is safe. Risk labels are conservative metadata heuristics.