Solve error javax.mail.AuthenticationFailedException

I'm not familiar with this function to send mail in java. I'm getting an error while sending email to reset a password. Hope you can give me a solution.

Below is my code:

public synchronized static boolean sendMailAdvance(String emailTo, String subject, String body)
{
    String host = AppConfigManager.getProperty("SENDER-EMAIL-SMTP-ADDRESS");
    String userName = AppConfigManager.getProperty("SENDER-EMAIL-SMTP-USERNAME");
    String password = AppConfigManager.getProperty("SENDER-EMAIL-SMTP-PASSWORD");
    String port = AppConfigManager.getProperty("SENDER-EMAIL-SMTP-PORT");
    String starttls = AppConfigManager.getProperty("SENDER-EMAIL-SMTP-STARTTLS");
    String socketFactoryClass = AppConfigManager.getProperty("SENDER-EMAIL-SMTP-SOCKET-CLASS");
    String fallback = AppConfigManager.getProperty("SENDER-EMAIL-SMTP-ALLOW-FALLBACK");                         

    try
    {
        java.util.Properties props = null;
        props = System.getProperties();
        props.put("mail.smtp.user", userName);
        props.put("mail.smtp.host", host);
        props.put("mail.smtp.auth", "true");
        props.put("mail.smtp.debug", "true");

        if(!"".equals(port))
        {
            props.put("mail.smtp.port", port);
            props.put("mail.smtp.socketFactory.port", port);
        }

        if(!"".equals(starttls))
            props.put("mail.smtp.starttls.enable",starttls);

        if(!"".equals(socketFactoryClass))                   
            props.put("mail.smtp.socketFactory.class",socketFactoryClass);

        if(!"".equals(fallback))
            props.put("mail.smtp.socketFactory.fallback", fallback);

        Session session = Session.getDefaultInstance(props, null);
        session.setDebug(true);

        MimeMessage msg = new MimeMessage(session);
        msg.setFrom(new InternetAddress(userName));
        msg.setSubject(subject);                
        msg.setText(body, "ISO-8859-1");
        msg.setSentDate(new Date());
        msg.setHeader("content-Type", "text/html;charset=\"ISO-8859-1\"");
        msg.addRecipient(Message.RecipientType.TO, new InternetAddress(emailTo));
        msg.saveChanges();

        Transport transport = session.getTransport("smtp");
        transport.connect(host, userName, password);
        transport.sendMessage(msg, msg.getAllRecipients());
        transport.close();
            return true;
    }
    catch (Exception mex)
    {
        mex.printStackTrace();
        return false;
    }
}

Throws the following error:

DEBUG: setDebug: JavaMail version 1.4.1ea-SNAPSHOT

DEBUG: getProvider() returning   javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Sun Microsystems, Inc]

DEBUG SMTP: useEhlo true, useAuth true

DEBUG SMTP: trying to connect to host "smtp.gmail.com", port 465, isSSL false 220 mx.google.com ESMTP m4sm5929870pbg.38 - gsmtp

DEBUG SMTP: connected to host "smtp.gmail.com", port: 465

EHLO fatin

250-mx.google.com at your service, [175.139.198.14]

250-SIZE 35882577

250-8BITMIME

250-AUTH LOGIN PLAIN XOAUTH XOAUTH2 PLAIN-CLIENTTOKEN

250-ENHANCEDSTATUSCODES

250 CHUNKING

DEBUG SMTP: Found extension "SIZE", arg "35882577"

DEBUG SMTP: Found extension "8BITMIME", arg ""

DEBUG SMTP: Found extension "AUTH", arg "LOGIN PLAIN XOAUTH XOAUTH2 PLAIN-CLIENTTOKEN"

DEBUG SMTP: Found extension "ENHANCEDSTATUSCODES", arg ""

DEBUG SMTP: Found extension "CHUNKING", arg ""

DEBUG SMTP: Attempt to authenticate

AUTH LOGIN

334 VXNlcm5hbWU6

YWNjb3VudEBibG9vbWluZy5jb20ubXk=

334 UGFzc3dvcmQ6

Ymxvb21pbmc= 535-5.7.8 Username and Password not accepted. Learn more at 535 5.7.8 http://support.google.com/mail/bin/answer.py?answer=14257

m4sm5929870pbg.38 - gsmtp

[STDOUT] javax.mail.AuthenticationFailedException

[STDOUT] at javax.mail.Service.connect(Service.java:319)

[STDOUT] at javax.mail.Service.connect(Service.java:169)

[STDOUT] at com.vlee.util.mail.SendMail.sendMailAdvance(SendMail.java:283)

[STDOUT] at com.vlee.servlet.ecommerce.DoMemberLogin.fnSendPwd(DoMemberLogin.java:251)

[STDOUT] at com.vlee.servlet.ecommerce.DoMemberLogin.doPost(DoMemberLogin.java:72)

Solution 1:

May be this problem cause by Gmail account protection. Just click below link and disable security settings.It will work. https://www.google.com/settings/security/lesssecureapps

Solution 2:

• https://www.google.com/settings/security/lesssecureapps
• go to your account and turn on the security it will work

Solution 3:

You should change the port to 587, I tested your code and it's working fine

If error still happens, please change session variable to code below:

Session session = Session.getInstance(props, new javax.mail.Authenticator() {
    protected PasswordAuthentication getPasswordAuthentication() {
        return new PasswordAuthentication(userName, password);
    }
});

Solution 4:

By default Gmail account is highly secured. When we use gmail smtp from non gmail tool, email is blocked. To test in our local environment, make your gmail account less secure as

1. Login to Gmail.
2. Access the URL as https://www.google.com/settings/security/lesssecureapps
3. Select "Turn on"