Node.js {[Error:connect ECONREFUNCE]代码：'；ECONREFUNCE'；，错误号：'；ECONREFUNCE'；，系统调用：'；connect'；}

我正在尝试使用express在node.js中发送邮件，并且使用了在diff端口上运行的socket.io，然后出现了此错误消息

var nodemailer = require('nodemailer');
var transporter = nodemailer.createTransport({
    service: 'Gmail',
    host: 'localhost',
    auth: {
        user: '____@gmail.com',
        pass: '*******'
    },
});

var mailOptions = {
        from: '____@gmail.com', // sender address
        to: 'vikash2696@gmail.com', // list of receivers
        subject: 'Hello ', // Subject line
    };
transporter.sendMail(mailOptions, function(error, info){
    if(error){
        console.log(error);
    }else{
        console.log('Message sent: ' + info.response);
    }
});

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给我们一些代码示例你需要用相关代码更新帖子。我们不能不看你的代码就给你任何答案。Vik，你需要在问题中添加代码，而不是在答案中添加代码。

var nodemailer = require('nodemailer');
var transporter = nodemailer.createTransport({
    service: 'Gmail',
    host: 'localhost',
    auth: {
        user: '____@gmail.com',
        pass: '*******'
    },
});

var mailOptions = {
        from: '____@gmail.com', // sender address
        to: 'vikash2696@gmail.com', // list of receivers
        subject: 'Hello ', // Subject line
    };
transporter.sendMail(mailOptions, function(error, info){
    if(error){
        console.log(error);
    }else{
        console.log('Message sent: ' + info.response);
    }
});