How can I send E-Mail Notifications in node.js

My query is simple, all of us receive many e-mail notifications and alerts every day and from various companies. I want to achieve exactly the same. I searched as much as I can, but I could only find the way to send the mail from my personal account (Gmail). But I want to use the company's account to send the mail.

If I use nodemailer, I need to use some smtp-host or some service (like Gmail), then I need to put some credentials (auth) to send.

But if I want to use the private company's account. How can I do it with that? I can't say service: "myPrivateCompany" and and assign properties to auth, it won't work, it works with Gmail, but it won't work with private company,

how can I make it work so the receiver knows which company/website or platform has sent e-mail?

I am a beginner as you know by now. Can someone also explain a bit about the 'service' and smptp-host and port?.

Here's the picture of what I have tried.

Hello here are my code I use for my company:

export const sendEmails = async () => {
  try {
    let transporter = nodemailer.createTransport({
      host: "smtp.your server",
      port: server port,
      secure: false,
      auth: {
        user: "email to used to send",
        pass: "That email password",
      },
      tls: {
        rejectUnauthorized: false,
      },
    });

    let info = await transporter.sendMail({
      from: "Sender email",
      to: "email to send to,
      subject: header,
      html: "message",
    });
  } catch (e) {
    throw new Error(e);
  }
};

The above is a function I use to send my email from my nodejs app.Try it am sure it will help

You can also pass in email,message and subject for easie