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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)')
   }
}

但我只得到这个错误，我不明白这个错误。什么意思以及如何解决这个问题

错误：错误：在 TCPConnectWrap.afterConnect [as oncomplete] 处连接 ECONNREFUSED 3.209.246.195:2525 (net.js:1146:16) { errno:-4078，代码：'ESOCKET'，系统调用：'connect'，地址：'3.209 .246.195'，端口：2525，命令：'CONN'}

我得到这个“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身份不匹配。在解决此错误之前无法发送邮件。访问 https://sendgrid.com/docs/for-developers/sending-email/sender-identity/ 在 SMTPConnection._actionSMTPStream (C:\Users\feruz\Desktop\complete\4-natours\node_modules\nodemailer\lib\smtp-connection\index.js:784:19) 处查看发件人身份要求:\Users\feruz\Desktop\complete\4-natours\node_modules\nodemailer\lib\smtp-connection\index.js:1674:34）在 SMTPConnection。(C:\Users\feruz\Desktop\complete\4-natours\node_modules\nodemailer\lib\smtp-connection\index.js:1152:22) 在 SMTPConnection._processResponse (C:\Users\feruz\Desktop\complete\ 4-natours\node_modules\nodemailer\lib\smtp-connection\index.js:947:20) 在 SMTPConnection._onData (C:\Users\feruz\Desktop\complete\4-natours\node_modules\nodemailer\lib\smtp- connection\index.js:749:14) 在 TLSSocket.SMTPConnection._onSocketData (C:\Users\feruz\Desktop\complete\4-natours\node_modules\nodemailer\lib\smtp-connection\index.js:189: 44) 在 TLSSocket.emit (events.js:315:20) 在 addChunk (_stream_readable.js:309:12) 在 TLSSocket.Readable.push (_stream_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。访问 https://sendgrid.com/docs/for-developers/sending-email/sender-identity/ 查看发件人身份要求，responseCode：550，
命令：“数据”}

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1 回答 1

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您使用的 IP、端口不正确或服务未在 3.209.246.195 的 2525 端口运行。你应该再检查一遍。

检查连接：ping 3.209.246.195

检查服务（端口）：telnet 3.209.246.195 2525

于 2021-12-28T16:18:01.960 回答