Nodemailer SMTP generating ENOTFOUND

Question

I'm trying to implement Nodemailer in Firebase and I keep getting ENOTFOUND error as below:

Error: getaddrinfo ENOTFOUND smtpout.secureserver.net smtpout.secureserver.net:587
at errnoException (dns.js:28:10)
at GetAddrInfoReqWrap.onlookup [as oncomplete] (dns.js:76:26)

code: 'ECONNECTION', errno: 'ENOTFOUND', syscall: 'getaddrinfo', hostname: 'smtpout.secureserver.net', host: 'smtpout.secureserver.net', port: 587, command: 'CONN'

My transporter setup is:

var transporter = nodemailer.createTransport({
        host: 'smtpout.secureserver.net',
        port: 587,
        auth: {
            user: 'uttsgroup@uttsg-demos.com',
            pass: 'somepassword'  
        },
        secure:false,
        tls: {rejectUnauthorized: false},
        debug:true
    });

I've tried various options but all were generating the same error result.

Please, assist.

Many Thanks,

Badih