Zoho Mail - javax.mail.AuthenticationFailedException: 535 Incorrect authentication data

Zoho Mail - javax.mail.AuthenticationFailedException: 535 Incorrect authentication data

I am receiving this message via Zoho Mail.

We are able to receive emails but when we send emails this error appears in RED - javax.mail.AuthenticationFailedException: 535 Incorrect authentication data

I feel SMTP server is incorrect and not able to send our emails. Can we get some help with this issue.

Regards

Jacob