Nodemailer times out but it worked before.

Hi, I use the following trnasport settings to send mails programmatically. It worked twice and then stopped by raising a timeout error: Error: queryA ETIMEOUT smtp.zoho.eu

{
"host": "smtp.zoho.eu",
"secure": true,
"port": 465,
"auth": {
"user": "mymail@example.com",
"pass": "app-generated-password"
}
}

I tried changing port to 587, secure = false, but nothing changed. And now it keeps giving me timeout even though it worked before and I changed nothing. The firewall hasn't changed.
I tried using openssl as suggested in other topics and it works, it doesn't timeout.

I don't know what to do anymore.

Here's the code:

const transportConfigs = JSON.parse(fs.readFileSync(__dirname + '/mails/transport.json'));
const mailTransport = mail.createTransport(transportConfigs);

mailTransport.verify((error, success) => {
if (error) {
console.error(`Transport settings NOT verified - ${error}`);
verified = false;
return;
}
console.log('Transport settings verified');
verified = true;
});

function onFormSubmit(req, res) {
options = {
from: `"[STEELGRIM FORM] ${req.body.firstName} ${req.body.lastName}" <${transportConfigs.auth.user}>`,
to: transportConfigs.auth.user,
subject: `${req.body.subject} <${req.body.email}>`,
cc: "",
text: req.body.message
};

console.log(`Sending mail: ${options.from}`);

mailTransport.sendMail(options, (error, info) => {
if (error) {
res.status = 500;
res.send(error);
console.error(`Unable to send mail ${options.from}. ${error}`);
} else {
res.status = 200;
res.send(info.response);
console.log("Mail sent");
}
});

Notice that the verify call fails before anything else gets done.