2026-04-17 09:00:46 SERVER -&gt; CLIENT: 220 smtp.gmail.com ESMTP d2e1a72fcca58-82f8e9d9a1csm1301652b3a.20 - gsmtp<br>
2026-04-17 09:00:46 CLIENT -&gt; SERVER: EHLO www.phpmailer.sysappsdev.com<br>
2026-04-17 09:00:46 SERVER -&gt; CLIENT: 250-smtp.gmail.com at your service, [192.250.235.218]250-SIZE 35882577250-8BITMIME250-STARTTLS250-ENHANCEDSTATUSCODES250-PIPELINING250-CHUNKING250 SMTPUTF8<br>
2026-04-17 09:00:46 CLIENT -&gt; SERVER: STARTTLS<br>
2026-04-17 09:00:46 SERVER -&gt; CLIENT: 220 2.0.0 Ready to start TLS<br>
2026-04-17 09:00:46 CLIENT -&gt; SERVER: EHLO www.phpmailer.sysappsdev.com<br>
2026-04-17 09:00:46 SERVER -&gt; CLIENT: 250-smtp.gmail.com at your service, [192.250.235.218]250-SIZE 35882577250-8BITMIME250-AUTH LOGIN PLAIN XOAUTH2 PLAIN-CLIENTTOKEN OAUTHBEARER XOAUTH250-ENHANCEDSTATUSCODES250-PIPELINING250-CHUNKING250 SMTPUTF8<br>
2026-04-17 09:00:46 CLIENT -&gt; SERVER: AUTH LOGIN<br>
2026-04-17 09:00:46 SERVER -&gt; CLIENT: 334 VXNlcm5hbWU6<br>
2026-04-17 09:00:46 CLIENT -&gt; SERVER: [credentials hidden]<br>
2026-04-17 09:00:47 SERVER -&gt; CLIENT: 334 UGFzc3dvcmQ6<br>
2026-04-17 09:00:47 CLIENT -&gt; SERVER: [credentials hidden]<br>
2026-04-17 09:00:47 SERVER -&gt; CLIENT: 534-5.7.9 Application-specific password required. For more information, go to534 5.7.9  https://support.google.com/mail/?p=InvalidSecondFactor d2e1a72fcca58-82f8e9d9a1csm1301652b3a.20 - gsmtp<br>
2026-04-17 09:00:47 SMTP ERROR: Password command failed: 534-5.7.9 Application-specific password required. For more information, go to534 5.7.9  https://support.google.com/mail/?p=InvalidSecondFactor d2e1a72fcca58-82f8e9d9a1csm1301652b3a.20 - gsmtp<br>
SMTP Error: Could not authenticate.<br>
2026-04-17 09:00:47 CLIENT -&gt; SERVER: QUIT<br>
2026-04-17 09:00:47 SERVER -&gt; CLIENT: 221 2.0.0 closing connection d2e1a72fcca58-82f8e9d9a1csm1301652b3a.20 - gsmtp<br>
SMTP Error: Could not authenticate.<br>
Message could not be sent. Mailer Error: SMTP Error: Could not authenticate.