Split forward for Cloudflare email worker

splitforward.js

export default {
  async email(message, env, ctx) {
    const forwardList = ["one@one.com", "two@two.com"];
    if (forwardList.indexOf(message.headers.get("from")) != -1) {
      await message.forward("three@three.com")
    }
    await message.forward("four@four.com");
  }
}