Error while processing the request! Unable to send message;Reason:530-5.5.1 Authentication Required. Learn more at 530 5.5.1 https://support.google.com/mail/answer/14257 205sm3156982qht.28 - gsmtp

Error while processing the request! Unable to send message;Reason:530-5.5.1 Authentication Required. Learn more at 530 5.5.1 https://support.google.com/mail/answer/14257 205sm3156982qht.28 - gsmtp

I follow the instruction but it still does not work. How can I send from my own gmail account.