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Send email with Resend

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Transactional email, like sign-up confirmations and receipts, is a common need. Resend sends it with a small API. This example sends one HTML email; the onboarding@resend.dev sender works for testing without verifying a domain. Set RESEND_API_KEY before running.

import { Resend } from "npm:resend";

const resend = new Resend(Deno.env.get("RESEND_API_KEY")!);
send returns either data with the message id, or an error. Check error rather than relying on a thrown exception.
const { data, error } = await resend.emails.send({
  from: "onboarding@resend.dev",
  to: "delivered@resend.dev",
  subject: "Hello from Deno",
  html: "<p>This email was sent with <strong>Resend</strong> from Deno.</p>",
});

if (error) {
  console.error("Failed to send:", error);
} else {
  console.log("Sent message:", data?.id);
}

Run this example locally using the Deno CLI:

deno run -N -E https://docs.deno.com/examples/scripts/send_email.ts

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