Nodemailer S/MIME Encryption via OpenSSL

Installation

npm i nodemailer-openssl-smime --save

Usage

import { createTransport } from "nodemailer";
import smime from "nodemailer-openssl-smime";

const sendEncryptedEmail = async () => {
  const transport = createTransport({
    /* ... */
  }).use("stream", smime({ recipient: "-----BEGIN CERTIFICATE-----..." }));

  await transport.sendMail({
    from: "[email protected]",
    to: "[email protected]",
    subject: "This is a test",
    text: "Hello world",
  });
};