mailgun-simple_skill

Overview

This skill sends outbound emails via the Mailgun API with a minimal, environment-driven interface. It supports both EU and US Mailgun regions and provides a simple command-line entrypoint for sending plain-text messages. The implementation prioritizes security by relying on caller-provided environment variables and not loading external .env files.

How this skill works

The skill reads required configuration from environment variables (API key, domain, region, optional default sender) and uses the official Mailgun SDK to construct and send plain-text messages. A small script accepts recipient, subject, body, and optional from address, then calls Mailgun’s messages API. Region selection (EU vs US) is configured at runtime to route requests to the appropriate Mailgun endpoint.

When to use it

• Send transactional or notification emails from lightweight services or scripts.
• Integrate outbound email capability into serverless functions or CI jobs without embedding credentials in code.
• Quickly test or troubleshoot email templates and delivery using a simple CLI.
• Route traffic to EU or US endpoints to meet data residency requirements.
• Replace ad-hoc SMTP setups with a managed API for better deliverability.

Best practices

• Always provide MAILGUN_API_KEY and use secure secret storage (environment variables, secret manager).
• Set MAILGUN_DOMAIN to a verified sending domain to avoid delivery failures.
• Choose MAILGUN_REGION based on data residency and routing needs (EU or US).
• Supply MAILGUN_FROM or pass an explicit from address on the command line to ensure correct sender headers.
• Monitor delivery and suppression lists from Mailgun dashboard; handle API errors and rate limiting in callers.

Example use cases

• Send password reset or welcome emails from a microservice triggered by events.
• Run a cron job that notifies admins of system alerts via Mailgun email.
• Embed simple CLI email sending into deployment scripts for release notifications.
• Test delivery and domain configuration by sending verification messages to QA inboxes.
• Use in serverless handlers where a tiny, environment-driven email client is required.