Gmail smtp server requires client authentication when using port 587. Using port 25 configuration is unsuccesful also. Do you hav any solution for that? Tks a lot in advance.
As the Forum’s FAQ/Rules demand, please search the guides (for Gmail in this case) and read the corresponding guide. The same rules ask you to also search the forum before starting a new topic. This has been discussed already in several threads.
Try using port 587 with TLS encryption and ensure your Gmail username and password are correct. If you have 2FA, use an App Password. Alternatively, you can try SMTP services like SMTPmart, Mailgun, Amazon SES, SMTPget or Postmark.