SMTP -> ERROR: Password not accepted from server: 535-5.7.8 Username and Password not accepted. For more information, go to
535 5.7.8  https://support.google.com/mail/?p=BadCredentials d2e1a72fcca58-7769a0d00d7sm2400076b3a.37 - gsmtp

<br />SMTP -> ERROR: MAIL not accepted from server: 530-5.7.0 Authentication Required. For more information, go to
530 5.7.0  https://support.google.com/accounts/troubleshooter/2402620. d2e1a72fcca58-7769a0d00d7sm2400076b3a.37 - gsmtp

<br />The following From address failed: poponix@naver.com : MAIL not accepted from server,530,5.7.0 Authentication Required. For more information, go to
530 5.7.0  https://support.google.com/accounts/troubleshooter/2402620. d2e1a72fcca58-7769a0d00d7sm2400076b3a.37 - gsmtp
<p>SMTP server error: 5.7.0 Authentication Required. For more information, go to
530 5.7.0  https://support.google.com/accounts/troubleshooter/2402620. d2e1a72fcca58-7769a0d00d7sm2400076b3a.37 - gsmtp
</p>