receiving forms even when emails are incorrect

Just recently I uploaded this plugin and it works pretty well when it comes to checking the email is correct or not when someone fills out our forms via the contact form 7. thank you for your efforts in setting up such a wonderful plugin.

However, we still seem to receive the form even when it indicates to the sender that the email was incorrect, and when the sender corrects the email, we receive the form again with the correct email address.
So now we are receiving the form twice, and its kind of effecting our data base integration, as we have an automated setting where each form submitted it automatically goes into our data base, hence we get two emails under the same name, one with the incorrect email and the other with the correct email.

How can we arrange the form NOT to be sent out (when pressing submit) the details when it indicates the email is incorrect?