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2026-06-18 18:16:31 CLIENT -> SERVER: EHLO nbpinyi.com 2026-06-18 18:16:31 CLIENT -> SERVER: AUTH LOGIN 2026-06-18 18:16:31 CLIENT -> SERVER: bmJwaW55aUAxMjYuY29t 2026-06-18 18:16:31 CLIENT -> SERVER: TmJwaW55aTIwMjA= 2026-06-18 18:16:31 SMTP ERROR: Password command failed: 535 Error: authentication failed 2026-06-18 18:16:31 SMTP Error: Could not authenticate. 2026-06-18 18:16:31 CLIENT -> SERVER: QUIT 2026-06-18 18:16:32 SMTP connect() failed. https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting