Individual skill

mailtrap-email-integration

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.

skills/mailtrap-email-integration/SKILL.md

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# 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.