self signed certificate in certificate chain error

问题:

I tried to write a simple mail program. I used node mailer and SMTP protocol module. I executed. But it shows an error like:

self signed certificate in certificate chain error in mail

what is the problem?

var express = require('express');
var app=express();
var nodemailer = require('nodemailer');
var smtpTransport = require('nodemailer-smtp-transport');

app.get('/nodemail', function(req, res, next) {

    var transporter = nodemailer.createTransport(smtpTransport({
        service: 'Gmail',
        host: 'smtp.gmail.com',
        port: 465,
        auth: {
            user: '[e-mail]',
            pass: '***********'
        }
    }));
    var link="https://codeforgeek.com/2016/06/node-js-redis-tutorial-building-email-verification-system/";
    transporter.sendMail({
        from: "[e-mail]",
        subject:"sailjstutorials" ,
        to: "[e-mail]",
        html : "Hello"+"vignesh <br> Please Click on the link to verify your email.<br><a href="+link+">Click here to verify</a>"
    }, function(error, info) {
        if (error) {
            return console.log(error);
        }
        console.log('Message %s sent: %s', info.messageId, info.response);
        console.log("Mail sent successfully");
        res.write("Mail sent successfully");
    });
});


app.listen(8086,function()
{
    console.log("port listening");
});

回答1:

I had the same issue just now, try checking out the link below for a more detailed response.

Error: self signed certificate in certificate chain Nodejs nodemailer express

Use tls.rejectUnauthorized = false to help avoid the issue.

Example:

        let transporter = nodemailer.createTransport({
            service: 'gmail',
            auth: {
                user: '[e-mail]', 
                pass: 'password' 
            },
            tls: {
                rejectUnauthorized: false
            }
        });