qed-mail/src/mx/verify.ts

📮 A NodeJS library for checking if an email address exists without sending any email.

import dns from "dns";
import { MxResult } from "../types";

async function checkMX(domain: string): Promise<MxResult> {
  return new Promise((resolve) => {
    dns.resolveMx(domain, (err, mxRecords) => {
      if (err || mxRecords.length === 0) {
        return resolve({ valid: false, mxRecords: [] });
      } else {
        resolve({ valid: true, mxRecords });
      }
    });
  });
}

export default checkMX;