Best practices

1. Use Environment Variables

Never hardcode API keys in your source code:

const API_KEY = process.env.AUTOSEND_API_KEY;

2. Implement Error Handling

Always handle errors appropriately:

try {
  const response = await sendEmail(data);
  console.log("Email sent:", response.data.emailId);
} catch (error) {
  if (error.response?.status === 429) {
    // Rate limit - retry later
  } else if (error.response?.status === 400) {
    // Validation error - fix the data
  } else {
    // Other error - log and alert
  }
}

3. Validate Email Addresses

Validate email addresses before sending to reduce bounces:

function isValidEmail(email) {
  const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
  return emailRegex.test(email);
}

4. Use Verified Domains

Always send from verified domains to ensure deliverability. Learn how to verify domains →

5. Include Unsubscribe Links

For marketing emails, always include unsubscribe links to comply with regulations and maintain good sender reputation. You can use {{unsubscribe}} and {{unsubscribe_preference}} variable tags in your email template to dynamically insert unsubscribe link.