mailtrap-email-integration

Original：🇺🇸 English

Translated

Guides agents through integrating transactional email sending via Mailtrap's Email API, including sandbox testing, domain verification, and API authentication. Use when implementing email-sending features, debugging delivery issues, or setting up safe dev/staging email testing.

5installs

Sourceaffaan-m/ecc

Added on2026-08-11

NPX Install

npx skill4agent add affaan-m/ecc mailtrap-email-integration

SKILL.md Content

View Translation Comparison →

Mailtrap Email Integration

Patterns for adding transactional email sending to an application using Mailtrap's Email API and Sandbox, covering authentication, environment separation, and common delivery pitfalls.

When to Activate

Implementing a "send email" feature (signup confirmation, password reset, notifications, receipts)
Debugging why emails aren't arriving in dev/staging
Setting up a project's first email-sending integration
Reviewing code that calls an email API directly without sandbox separation

Core Concepts

Sandbox vs. Production separation. Mailtrap provides a Sandbox API that captures emails without delivering them, used for dev/staging so test emails never reach real inboxes. Production sending uses a separate, verified-domain endpoint. Never point a dev environment at the production sending endpoint.

Authentication. Requests use a Bearer token in the

Authorization

header. Tokens are scoped per project; sandbox and production typically use different tokens.

Domain verification. Production sending requires verifying a sending domain via DNS records (SPF, DKIM, DMARC) before Mailtrap will deliver to real recipients. Skipping this causes silent delivery failures or spam-folder placement.

Code Examples

typescript

// Sending via Mailtrap's Email API (production)
async function sendEmail(to: string, subject: string, html: string) {
  const response = await fetch("https://send.api.mailtrap.io/api/send", {
    method: "POST",
    headers: {
      "Authorization": `Bearer ${process.env.MAILTRAP_API_TOKEN}`,
      "Content-Type": "application/json",
    },
    body: JSON.stringify({
      from: { email: "no-reply@yourverifieddomain.com", name: "Your App" },
      to: [{ email: to }],
      subject,
      html,
    }),
  });

  if (!response.ok) {
    throw new Error(`Email send failed: ${response.status}`);
  }
  return response.json();
}