Trying to measure the email pressure we are putting on our leads, i have been searching for a while how we could report on the number of leads who were targeted by a smart campaign that should have sent and email but did not receive it.
Of course, we could imagine a score and have a smart campaign that add +1 before sending the email and -1 after sending it, only if it was sent. We can also imagine to manage a few things with program statuses.
But all this becomes soon very cumbersome and unpractical. Further more, is will only work for future campaigns not for the past.
So if any one have a idea on getting the list of lead that were targeted and yet were not sent, be my guest