exports.newRegistration=function(parametros,callback)
{
    var mailOptions =
    {
        from: "<myemailingoogle@gmail.com>",//my email
        to: parametros.useremail,//user email
        subject: 'Welcome '+parametros.useremail+'.',
        html:   '<br><b>Hello</b><br>'+ // html

    };
    var smtpTransport = nodemailer.createTransport("SMTP",
    {
        service: "Gmail",
        secureConnection: true,
        auth:
        {
            user: "myemailingoogle@gmail.com",
            pass: "7ftera359c28a",
        },
    });
    smtpTransport.sendMail(mailOptions, function(err, response)
    {
        if(err)
        {
            smtpTransport.close();
            console.warn(err);
            return callback(err,null);
        }else{
            smtpTransport.close();
            return callback(null,response);
        }
    });
}

mail mymailin@gmail.com
Cc: // press enter
Subject: Welcome

Hello Mail.

// Ctrl+D

smtp: '535 5.7.8 Error: authentication failed: generic failuren'

telnet localhost 25
ehlo localhost
250-mydomain.com
250-PIPELINING
250-SIZE 10240000
250-VRFY
250-ETRN
250-STARTTLS
250-AUTH PLAIN LOGIN
250-AUTH=PLAIN LOGIN
250-ENHANCEDSTATUSCODES
250-8BITMIME
250 DSN
mail to: myuserin@gmail.com
501 5.5.4 Syntax: MAIL FROM:<address>
mail from: info@mydomain.com
250 2.1.0 Ok
rcpt to: myuserin@gmail.com
451 4.3.0 <myuserin@gmail.com>: Temporary lookup failure
data
554 5.5.1 Error: no valid recipients
AUTH LOGIN
503 5.5.1 Error: MAIL transaction in progress

220 mydomain.com ESMTP Postfix (Ubuntu)
ehlo localhost
250-mydomain.com
250-PIPELINING
250-SIZE 10240000
250-VRFY
250-ETRN
250-STARTTLS
250-AUTH PLAIN LOGIN
250-AUTH=PLAIN LOGIN
250-ENHANCEDSTATUSCODES
250-8BITMIME
250 DSN
AUTH LOGIN
334 VXNlcm5hbWU6
UbuntuUser
535 5.7.8 Error: authentication failed: another step is needed in authentication

220 mydomain.com ESMTP Postfix (Ubuntu)
ehlo localhost
250-mydomain.com
250-PIPELINING
250-SIZE 10240000
250-VRFY
250-ETRN
250-STARTTLS
250-AUTH PLAIN LOGIN
250-AUTH=PLAIN LOGIN
250-ENHANCEDSTATUSCODES
250-8BITMIME
250 DSN
auth login
334 VXNlcm5hbWU6
root
334 UGFzc3dvcmQ6
rootPassword
535 5.7.8 Error: authentication failed: another step is needed in authentication

Jun 20 15:50:16 myname postfix/smtpd[12528]: warning: localhost[127.0.0.1]:             SASL login authentication failed: another step is needed in authentication

var email   = require("emailjs");

    postfixSend = function postfixSend(emailInfo, callback) {

        var server  = email.server.connect({
            user:    "yourEmailAccountUser",
            password: "yourPassword",
            host:    "localhost",
            ssl:     false
        });

        server.send({
            text:    emailInfo.msg,
            from:    emailInfo.from,
            to:      emailInfo.to,
            subject: emailInfo.subject
            }, function(err, message) {
                callback(err);
        });

    }

    exports.postfixSend = postfixSend;

pwcheck_method: auxprop
auxprop_plugin: sasldb
mech_list: PLAIN LOGIN