CF7 not sending emails

Hi,

The CF7 is not sending email. All the time it shows error “There was an error trying to send your message. Please try again later.” with Red border.

Please note that I have installed “Easy WP SMTP” plugin, sending test email from the plugin works properly, I am getting test emails but not from the CF7 form submit from my website.

I have WordPress 5.4.1 and CF7 5.1.9