如何使用4078代码解决Sendgrid nodemailer错误

Question

我写电子邮件类：

const pug = require('pug')
const nodemailer = require('nodemailer');
const htmlToText = require('html-to-text');

module.exports = class Email{
   constructor(user, url) {
      this.to = user.email;
      this.firstName = user.name.split(' ')[0];
      this.url = url;
      this.from = `Feruz Atamuradow <${process.env.EMAIL_FROM}>`;
   }

   newTransport() {
      if (process.env.NODE_ENV === 'production') {
         return nodemailer.createTransport({
         service: 'SendGrid',
         auth: {
            user: process.env.SENDGRID_USERNAME,
            pass: process.env.SENDGRID_PASSWORD
         }
         });
      }

      return nodemailer.createTransport({
         host: process.env.EMAIL_HOST,
         port: process.env.EMAIL_PORT,
         auth: {
         user: process.env.EMAIL_USERNAME,
         pass: process.env.EMAIL_PASSWORD
         },
         tls:{
            rejectUnauthorized:false
         } // and  try this without 

      });
  }

   async send(template, subject) {
      const html = pug.renderFile(`${__dirname}/../views/email/${template}.pug`, {
         firstName: this.firstName,
         url: this.url,
         subject
      });

      const mailOptions = {
         from: this.from,
         to: this.to,
         subject,
         html,
         text: htmlToText.fromString(html)
      }
      
      await this.newTransport().sendMail(mailOptions)

   }
   async sendWelcome() {
      await this.send('welcome', 'Welcome to the Natours Family!');
   }
   async sendPasswordReset() {
      await this.send('passwordReset', 'Your password reset token (valid for only 10 minutes)')
   }
}

但我只得到了这个错误，我不理解这个错误。这意味着什么以及如何解决

错误：错误：在TCPConnectW连接ECONNREFUSED3.209.246.195:2525rap.after连接[作为完成]（net.js:1146： 16）{errno：-4078，代码：“ESOCKET”，系统调用：“连接”，地址：“3.209.246.195”，端口：2525，命令：“CONN”}

我发现这个“生产”错误：

错误：错误：消息失败：550发件人地址与已验证的发件人标识不匹配。在解决此错误之前，无法发送邮件。参观https://sendgrid.com/docs/for-developers/sending-email/sender-identity/查看SMTPConnection的发件人身份要求_SMTPConnection处的formatError（C:\Users\feruz\Desktop\complete\4-natours\node\U modules\NodeEmailer\lib\smtp connection\index.js:784:19）_SMTPConnection上的actionSMTPStream（C:\Users\feruz\Desktop\complete\4-natours\node\U modules\NodeEmailer\lib\smtp connection\index.js:1674:34）。（C:\Users\feruz\Desktop\complete\4-natours\node\u modules\nodemailer\lib\smtp connection\index.js:1152:22）位于SMTPConnection_SMTPConnection上的processResponse（C:\Users\feruz\Desktop\complete\4-natours\node\U modules\NodeEmailer\lib\smtp connection\index.js:947:20）_TLSSocket上的onData（C:\Users\feruz\Desktop\complete\4-natours\node\u modules\nodemailer\lib\smtp connection\index.js:749:14）。SMTP连接_位于TLSSocket的onSocketData（C:\Users\feruz\Desktop\complete\4-natours\node\U modules\NodeEmailer\lib\smtp connection\index.js:189:44）。在TLSSocket的readableAddChunk（\u stream\u readable.js:309:12）处的addChunk（\u stream\u readable.js:284:9）处发出（events.js:315:20）。可读。推送（\u stream\u readable.js:223:10）{代码：“EMESSAGE”，响应：“550发件人地址与已验证的发件人身份不匹配。在解决此错误之前，无法发送邮件。请访问https://sendgrid.com/docs/for-developers/sending-email/sender-identity/要查看发件人身份要求，请执行响应代码：550，命令：'数据'}

Answer 1

IP，您使用的端口不正确或服务未在3.209.246.195的端口2525上运行。您应该再次检查它。

检查连接：ping3.209.246.195

检查服务（端口）：telnet 3.209.246.195 2525