SMTP setup error

Hi, I am getting this error when I try to send a test email from the plugin Easy WP SMTP, the host I have as far as I am concerned is correct? but it is saying that it is not.

I must be missing something in the setup, can anyone help please?

Invalid host: [email protected] connect() failed. https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting

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