send-email

Resend provides two endpoints for sending emails: Choose batch when: Choose single when: Always implement these for production email sending. See references/best-practices.md for complete implementations. Prevent duplicate emails when retrying failed requests. Endpoint: POST /emails (prefer SDK over cURL) *Parameter naming varies by SDK (e.g., replyTo in Node.js, reply_to in Python). See references/single-email-examples.md for all SDK implementations with error handling and retry logic. Endpoint: POST /emails/batch (but prefer SDK over cURL) Since the entire batch fails on any validation error, validate all emails before sending: See references/batch-email-examples.md for all SDK implementations with validation, error handling, and retry logic. For sends larger than 100 emails, chunk into multiple batch requests: See references/batch-email-examples.md for complete chunking implementations. Follow these practices to maximize inbox placement.