Function mailConfigHandler

api/mail-config.js:65–96

(url)

};

const mailConfigHandler = async (url) => {
  const { hostname: domain } = parseTarget(url);
  try {
    const [mxRecords, rootTxt, dmarcTxt, bimiTxt, dkimResults] = await Promise.all([
      dns.resolveMx(domain),
      safeTxt(domain),
      safeTxt(`_dmarc.${domain}`),
      safeTxt(`default._bimi.${domain}`),
      findDkim(domain),
    ]);

    // Collect email-relevant TXT records
    const emailTxt = rootTxt.filter((r) => {
      const s = r.join('').toLowerCase();
      return s.startsWith('v=spf1');
    });
    dmarcTxt.forEach((r) => emailTxt.push(r));
    bimiTxt.forEach((r) => emailTxt.push(r));
    dkimResults.forEach(({ record }) => emailTxt.push(record));

    return {
      mxRecords,
      txtRecords: emailTxt,
      mailServices: detectProviders(mxRecords),
    };
  } catch (error) {
    if (error.code === 'ENOTFOUND' || error.code === 'ENODATA') {
      return { skipped: 'No mail server in use on this domain' };
    }
    return { error: `Mail config lookup failed: ${error.message}` };
  }
};

export const handler = middleware(mailConfigHandler);
export default handler;