Notification of email failing to be sent

We would like the system to tell us if an email has failed to send. We do get a bounced back from our outlook if we have entered the incorrect email address, however if someone doesn't have an email address entered in axcelerate doesn't provide any notification of this when sending the email. When an email is successfully sent it will display a big green box advising it has been sent. so maybe if the email hasn't been sent successfully we could see a big red box advising us the email hasn't been sent. at the moment we get no notification of failed emails.