nodemail self signed certificate in certificate chain

1var transporter = nodemailer.createTransport({
2      host: "outmail.abc.co.th", // hostname
3      secure: false, // use SSL
4      port: 25, // port for secure SMTP
5      auth: {
6          user: "username@abc.co.th",
7          pass: "passwordmail"
8      },
9      tls: {
10          rejectUnauthorized: false
11      }
12  });
13  

1Disable your antivirus software