NodemailerError - Invalid login: 535-5.7.8 Username and Password not accepted

Question

I've been trying to setup a simple OTP verification system on my webpage using Nodemailer module, the whole code is a bit long, so here is a reproducible example,

[server.js]

`````````````````````````````````````````````````````````````````````
let nm = require('nodemailer');

let trans = nm.createTransport({
host: 'smtp.gmail.com',
port: 465,
secure: true, // use SSL
auth: {
user: '<[e-mail]>',
pass: '<mypassword>'
}
});

let details = {
from: '<[e-mail]>',
to: '<[e-mail]>',
subject: 'Heading',
html: 'Some content'
};

trans.sendMail(details, console.log); // one-liner handling
````````````````````````````````````````````````````````````````````

The above code outputs the following error:

-----------------------------------------------------------------------------------
> Error: Invalid login: 535-5.7.8 Username and Password not accepted.
.....
code: 'EAUTH',
.....
command: 'AUTH PLAIN'
-------------------------------------------------------------------------------------

I've tried changing my `transport` as per the article at
https://www.w3schools.com/nodejs/nodejs_email.asp,

``````````````````````````````````````````````````
let trans = nm.createTransport({
service: 'Gmail', // also tried 'gmail'
auth: {
user: '<[e-mail]>',
pass: '<mypassword>'
}
});
``````````````````````````````````````````````````

But, it results in the same error. How to fix it?

> Note: I've enabled "Access for less secure apps" in my gmail, and I don't have two-step verification turned on. Also, I'm using Windows 10, Node v10.x, Nodemailer v6.x.

Please note that, I'm using www.sololearn.com :)

Answer 1

Gmail server normally blocked access if the server is far away from your location. Better use smtp email or email api provided by services like sendGrid