NodeMailer, send specific number of emails - node.js

Question

I need help sending a specific number of emails with nodemailer, lets say i want to send 20 emails to a specific person.
This is my code.
const transporter = nodemailer.createTransport(smtpTransport({
host: "smpt.gmail.com", //smtp server
port: 587,
pool: true,
secure: false, // true for 465, false for other ports
auth: {
user: "testtest#gmail.com", // mail
pass: "testtesttest" // password
}
}));
transporter.close();
// setup email data with unicode symbols
let mailOptions = {
from: '"Test Test" <testtest#gmail.com>', // sender address
to: mailto, // list of receivers
subject: args[1], // Subject line
text: args[2] //
};
async function sendMail() {
let info = await transporter.sendMail(mailOptions);
sending = true;
}
const SendingMessage = setInterval(() => {
var mailto = args[0];
mailOptions.subject = args[1];
var mailtxt = args[2];
sendMail();
}, 1500);
How do i make it send a message like "hey" to test#test.com 5 times only. because currently it just sends "hey" until i hit my smtp sending limit

Answer 1

First create an array of mail content you want to send, for example;
const mails2send = [
{
from: '..',
to: '..',
subject: '..'
text: '..'
},
{
from: '..',
to: '..',
subject: '..'
text: '..'
},
{
from: '..',
to: '..',
subject: '..'
text: '..'
}
]
Modify the sendMail function to take in argument.
async function sendMail(mailOptions) {
let info = await transporter.sendMail(mailOptions);
sending = true;
return sending;
}
then map through the mails2send
mails2send.forEach( item => sendMail(item ))
Update It appears you may be talking about your setInterval function
let counter = 0;
const SendingMessage = setInterval(() => {
var mailto = args[0];
mailOptions.subject = args[1];
var mailtxt = args[2];
sendMail();
if (counter === 4) {
return clearInterval(SendingMessage); //<-- clear the interval when reach 5.
}
counter++ //<-- counter increment.
}, 1500);

Answer 2

Umm, maybe this is what you want ?
This will send mail to each of address 5 times and blocking / synchronously.
const nodemailer = require("nodemailer");
function template(address) {
return {
from: '"Fred Foo 👻" <foo#example.com>', // sender address
to: address, // list of receivers
subject: "Hello ✔", // Subject line
text: "Hello world?", // plain text body
html: "<b>Hello world?</b>", // html body
};
}
async function main() {
const transport = nodemailer.createTransport({
host: "smtp.ethereal.email",
port: 587,
auth: {
user: "augustine.kozey54#ethereal.email",
pass: "5Jq3GYxyTu51Pxx8Hr",
},
});
const addresses = [
"budi#mail.com",
"ami#mail.com",
"indah#mail.com",
"july#mail.com",
"meita#mail.com",
];
/*
Using for loop
*/
// const mailer = [];
// for (let i = 0; i < addresses.length; i++) {
// for (let j = 0; j < 5; j++) {
// mailer.push(transport.sendMail(template(addresses[i])));
// }
// }
/*
Using for map
*/
const mailer = addresses
.map((address) => {
return [...Array(5)].map((i) => transport.sendMail(template(address)));
})
.flatMap((array) => [...array]);
return await Promise.all(mailer);
}
main()
.then((res) => console.log(res))
.catch((e) => console.error(e));

Answer 3

const nodemailer = require("nodemailer");
function template(address) {
return {
from: '"Fred Foo 👻" <foo#example.com>', // sender address
to: address, // list of receivers
subject: "Hi", // Subject line
text: "Hi", // plain text body
// html: "<b>Hello world?</b>", // html body
};
}
async function main() {
const transport = nodemailer.createTransport({
host: "smtp.ethereal.email",
port: 587,
auth: {
user: "augustine.kozey54#ethereal.email",
pass: "5Jq3GYxyTu51Pxx8Hr",
},
});
const addresses = [
"test#gmail.com"
];
/*
Using for loop
*/
// const mailer = [];
// for (let i = 0; i < addresses.length; i++) {
// for (let j = 0; j < 5; j++) {
// mailer.push(transport.sendMail(template(addresses[i])));
// }
// }
/*
Using for map
*/
const mailer = addresses
.map((address) => {
return [...Array(5)].map((i) => transport.sendMail(template(address)));
})
.flatMap((array) => [...array]);
return await Promise.all(mailer);
}
main()
.then((res) => console.log(res))
.catch((e) => console.error(e));