javascript - NodeJS为nodemailer设置超时

Question

制作了一个小脚本，可以从另一个文件中获取电子邮件列表。然后使用 forEach 使用 nodemailer 中的邮件功能向他们每个人发送电子邮件。我的问题是我希望在发送的每封电子邮件之间有一个超时。我已经尝试了几件事，但我只是被卡住了。如果有人可以帮我一把。这是我第一个尝试编写代码的项目。

        'use strict';
const nodemailer = require('nodemailer');
var fs = require('fs');
//--------------------------------------------------------------------------
// Load Victims
//--------------------------------------------------------------------------
var victims = fs.readFileSync('./victims.txt', 'utf8').split("\r\n");
var letter = fs.readFileSync('./letter.txt', 'utf8');

victims.forEach(function(item, index, array) {
        let transporter = nodemailer.createTransport({
        pool: true,
        maxConnections: 1,
        maxMessages: 1,
        rateDelta: 3000,
        rateLimit: 1,
        host: 'mail.asrebaziemast.com',
        port: 587,
        secure: false, // true for 465, false for other ports
        tls: {
        // do not fail on invalid certs
        rejectUnauthorized: false
    },
        auth: {
            user: "[e-mail]", // generated ethereal user
            pass: "D@gician#d21" // generated ethereal password
        }
    });
        let mailOptions = {
        from: '"Freddy Mang" <[e-mail]>', // sender address
        to: item, // list of receivers
        subject: 'Hello ✔', // Subject line
        html: letter, // html body
        encoding: 'base64'
    };
    setTimeout(function () {
        transporter.sendMail(mailOptions, (error, info) => {
        if (error) {
            return console.log(error);
        }
        console.log('Message sent: %s', info.messageId, item);
    });
    }, 5000); 

});

标签： javascriptnode.js

Answer 1

rateLimit/rateDelta选项是您想要的，问题是您正在为每封电子邮件创建一个新的传输器实例。

将传输创建移到外部forEach以重用相同的实例，例如

const transporter = nodemailer.createTransport({
  pool: true,
  maxConnections: 1,
  maxMessages: 1,
  rateDelta: 3000,
  rateLimit: 1,
  host: 'mail.asrebaziemast.com',
  port: 587,
  secure: false, // true for 465, false for other ports
  tls: {
    // do not fail on invalid certs
    rejectUnauthorized: false
  },
  auth: {
    user: "[e-mail]", // generated ethereal user
    pass: "D@gician#d21" // generated ethereal password
  }
});
victims.forEach(item => {
  transporter.sendMail({
    from: '"Freddy Mang" <[e-mail]>', // sender address
    to: item, // list of receivers
    subject: 'Hello ✔', // Subject line
    html: letter, // html body
    encoding: 'base64'
  }, (err, info) => {
    if (err) {
      return console.log(err);
    }
    console.log('Message sent: %s', info.messageId, item);
  });
});