javax.mail.AuthenticationFailedException: 535 Authentication Failed when Sending Mail through Java Code

javax.mail.AuthenticationFailedException: 535 Authentication Failed when Sending Mail through Java Code

Hi All, 

I don't know why I'm facing the above issue: Please help. 

  1. 2019-03-27T14:39:47.413256+00:00 app[web.1]: 535 Authentication Failed
    2019-03-27T14:39:47.413628+00:00 app[web.1]: javax.mail.AuthenticationFailedException: 535 Authentication Failed
    2019-03-27T14:39:47.413632+00:00 app[web.1]: 
    2019-03-27T14:39:47.413773+00:00 app[web.1]: 	at com.sun.mail.smtp.SMTPTransport$Authenticator.authenticate(SMTPTransport.java:965)
    2019-03-27T14:39:47.413847+00:00 app[web.1]: 	at com.sun.mail.smtp.SMTPTransport.authenticate(SMTPTransport.java:876)
    2019-03-27T14:39:47.413881+00:00 app[web.1]: 	at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:780)
    2019-03-27T14:39:47.413924+00:00 app[web.1]: 	at javax.mail.Service.connect(Service.java:388)
    2019-03-27T14:39:47.413961+00:00 app[web.1]: 	at javax.mail.Service.connect(Service.java:246)
    2019-03-27T14:39:47.414001+00:00 app[web.1]: 	at javax.mail.Service.connect(Service.java:195)
    2019-03-27T14:39:47.414040+00:00 app[web.1]: 	at javax.mail.Transport.send0(Transport.java:254)
    2019-03-27T14:39:47.414079+00:00 app[web.1]: 	at javax.mail.Transport.send(Transport.java:124)
    2019-03-27T14:39:47.414119+00:00 app[web.1]: 	at com.winwithweb.application.service.EmailUtility.sendEmail(EmailUtility.java:56)
    2019-03-27T14:39:47.414160+00:00 app[web.1]: 	at com.winwithweb.application.threading.SendEmail.run(SendEmail.java:26)
    2019-03-27T14:39:47.414200+00:00 app[web.1]: 	at java.lang.Thread.run(Thread.java:748)