send-email

To send transactional emails reliably with Resend, use the appropriate SDK to validate required fields like from, to, subject, and content, while implementing idempotency keys and retry strategies to prevent duplicate sends and handle failures.

Idempotency keys prevent duplicate batch email sends by identifying each request uniquely. If a network timeout triggers an automatic retry, the Resend API uses the key to recognize and ignore the duplicate request, ensuring recipients receive only one copy.

The best way to handle errors and retries for transactional emails is to implement robust retry strategies with exponential backoff. This approach manages transient Resend API failures automatically, ensuring reliable deliverability without overwhelming the service.

The required fields to send an email through the Resend SDK are from, to, subject, and either html or text for the body. Optional fields include cc, bcc, reply_to, attachments, and scheduling parameters.

Yes, you can schedule transactional emails and add attachments using optional fields supported by the Resend SDK. Alongside required fields like subject and html, you can configure cc, bcc, reply_to, attachments, and scheduling parameters.

You need idempotency keys for automated order confirmation emails to prevent duplicates during network failures. If an API request times out and retries, the key ensures the Resend server processes the transaction only once, avoiding multiple confirmations.