Cloudflare Worker for redirecting autodiscovery/autoconfiguration of email servers

autodiscover-email-redirects.worker.js

/**
 * Handle redirects with cloudflare worker to avoid duplication
 * https://forum.sympl.io/t/configure-auto-discover-for-mail-setup/94/6
 */
export default {
  async fetch(request) {
    const url = new URL(request.url);
    if (url.pathname === "/.well-known/autoconfig/mail/config-v1.1.xml") {
      const targetUrl = `https://autoconfig.${url.hostname}/mail/config-v1.1.xml`;
      return fetch(targetUrl, request);
    }
    if (url.pathname === "/autodiscover/autodiscover.xml") {
      const targetUrl = `https://autodiscover.${url.hostname}/autodiscover/autodiscover.xml`
      return fetch(targetUrl, request)
    }

    return fetch(request);
  },
};