Best practices

const API_KEY = process.env.AUTOSEND_API_KEY;

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
  }
}

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