Mailtrap Email Sending MCP

An MCP server that provides a tool for sending transactional emails via Mailtrap

→ railsware/mailtrap-mcp · listed on mcp_so

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// key findings

⚠️

Known vulnerabilities in dependencies: 3 high

Affects packages this MCP installs at runtime. Upgrade or remove the affected dependency.

✅

No credential exfiltration, no sensitive file access, no obfuscation

Static analysis found nothing flowing your secrets to unexpected places.

✅

Open source with a license and README

Anyone can audit the code, the license is declared, and the publisher documents what it does.

🔐

You'll be asked for 1 credential: MAILTRAP_ORGANIZATION_API_TOKEN

These are read from process.env at runtime. Make sure you trust where they’ll be sent.

// required environment variables

This server reads these from process.env. You'll be asked to provide them before it can run.

configDEFAULT_FROM_EMAIL— Default sender email when from is not provided to send-email or send-sandbox-email. Enables switching sender per call via the from parameter.

configMAILTRAP_ACCOUNT_ID— Required for templates, stats, email logs, sandbox list/show, and sending domains. Optional only for send-email and send-sandbox-email.

🔐 secretMAILTRAP_ORGANIZATION_API_TOKEN— Organization-scoped API token. Required for organization tools (separate from MAILTRAP_API_TOKEN).

configMAILTRAP_ORGANIZATION_ID— Required for organization tools (list-sub-accounts, create-sub-account).

configMAILTRAP_SANDBOX_ID— Default sandbox ID for sandbox tools when sandbox_id is not provided. Enables switching between sandboxes per call via the sandbox_id parameter.

configMAILTRAP_TEST_INBOX_ID— Default test inbox ID for sandbox tools when test_inbox_id is not provided. Enables switching between inboxes per call via the test_inbox_id parameter.

// full audit trail

The full breakdown of what we checked, the deductions that landed, the network hosts, the dependency advisories, and concrete fix guidance is available to verified publishers.

// improvement guidance — verified publishers only

We have 1 concrete improvement we can share with the publisher of this MCP. Each comes with specific guidance to raise the trust score.

// embed badge in your README

[![M8ven Score](https://m8ven.ai/badge/mcp/railsware-mailtrap-mcp-1xaayu)](https://m8ven.ai/mcp/railsware-mailtrap-mcp-1xaayu)

commit: 0b0333bdd6c171c2b62cbd6c7336a238707c25ed

code hash: c4d81d37ee33b2a1364f8275bcd0121ed89fdb9d6ef82fbdac3f2ccaa19076e0

verified: 6/16/2026, 12:28:31 PM

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