resend

Install the resend SDK, initialize it with your API key, and call resend.emails.send with from, to, subject, and html parameters. Always pass an idempotency key like 'welcome-email/user-123' to prevent duplicate sends on retries, and check the returned error field instead of using try/catch in Node.js.

Configure an MX record or use a resend.app address, then subscribe to the email.received webhook event. Verify signatures with resend.webhooks.verify, and note that webhook payloads contain metadata only — call resend.emails.receiving.get with the email_id to retrieve the body.

No, the Node.js SDK returns a { data, error } object instead of throwing. Always destructure and check the error field explicitly rather than wrapping calls in try/catch blocks.

The default [email protected] address is a sandbox that only delivers to your own Resend account email. To send to real recipients, verify your own domain by adding the DNS records returned by resend.domains.create and confirming verification.

No, the batch endpoint (POST /emails/batch) supports 2-100 distinct emails but does not support attachments or scheduling. Use individual single sends when you need attachments or scheduled delivery.

Templates support a maximum of 50 variables using triple-mustache syntax like {{{VARIABLE_NAME}}}, with keys limited to 50 alphanumeric or underscore characters. Loops and conditionals are not supported, so pre-render dynamic lists server-side into a single HTML variable.