Nodemailer: Kesalahan: sertifikat yang ditandatangani sendiri - SMTP SSL

hai, saya mendapat kesalahan saat mencoba mengirim email menggunakan SMTP

root<strong i="6">@sg01</strong>:/home/node# node stats.js
SMTP Configured
Sending Mail
Error occurred
self signed certificate

ini skrip pengujian saya

var mailer = require('nodemailer');

var transporter = mailer.createTransport({
    host: '128.199.226.xxx',
    port: 465,
    secure: true,

    auth: {
        user: '[email protected]',
        pass: 'xxx'
    }
});

console.log('SMTP Configured');

// Message object
var message = {

    // sender info
    from: 'KabarGames <[email protected]>',

    // Comma separated list of recipients
    to: "tes" <[email protected]>',

    // Subject of the message
    subject: 'Nodemailer is unicode friendly ✔', //

    // plaintext body
    text: 'Hello to myself!',

    // HTML body
    html: '<p><b>Hello</b> to myself <img src="cid:[email protected]"/></p>' +
        '<p>Here\'s a nyan cat for you as an embedded attachment:<br/><img src="cid:[email protected]"/></p>',

    // Apple Watch specific HTML body
    watchHtml: '<b>Hello</b> to myself',

};

console.log('Sending Mail');
transporter.sendMail(message, function(error, info) {
    if (error) {
        console.log('Error occurred');
        console.log(error.message);
        return;
    }
    console.log('Message sent successfully!');
    console.log('Server responded with "%s"', info.response);
});