Send email without password using nodemailer over a zimbra smtp - node.js

Question

im using nodemailer to send emails in a web app using keystonejs as cms. The web app is stored in a server and the email server in other, but SMTP communications between servers does not require password. Now, i need to send emails to other peoples when required using a generic account without the password field because is not neccesary.
This is my nodemailer config:
var selfSignedConfig = {
host: 'smtp.abc.cu',
port: 25,
secure: false, // use TLS
auth: {
user: email.email,
pass: email.password //NOT REQUIRED
},
tls: {
// do not fail on invalid certs
rejectUnauthorized: false
}
};
var transporter = nodemailer.createTransport(selfSignedConfig);
// verify connection configuration
and:
"email": {
"email": "abcde#abc.cu",
"password": ""
}
I'm stuck on this, I have tried with "password": "" and "password": " " and nothing works. The email server is Zimbra.
This gave me the following error:
*-------------------------*
The server IS NOT READY to take the messages: Error: Invalid login: 535 5.7.8 Error: authentication failed: authentication failure
*-------------------------*
Greetings...

Answer 1

In our case we removed tls, auth and secure fields and it worked on our SMTP server.
The from, to options were set from mail options separately.
You might give the following a try:
var nodemailer = require ('nodemailer'),
_ = require ('lodash')
var selfSignedConfig = {
host: 'smtp.abc.cu',
port: 25
};
var transporter = nodemailer.createTransport(selfSignedConfig);
var attachFiles = attachments?attachments:[];
var attachObjArray = [];
_.forEach(
attachFiles,
filePath=>attachObjArray.push({path:filePath})
);
var mailOptions = {
from: fromEmail, // sender address (who sends)
to: toEmail, // list of receivers (who receives)
subject: subject, // Subject line
html: body, // html body
attachments:attachObjArray //attachment path with file name
};
// send mail with defined transport object
transporter.sendMail(mailOptions, function(error, info) {
if(error){
return console.log(error);
} else {
console.log('Message sent: ' + info.response);
}
done();
});