Know Which Subscribers are No Longer Opening Your Messages



How could you know..

......which subscribers are No Longer Opening Your Messages?

I found this function in almost every AR (Aweber, GetResponse - well, all of them)
but to my surprise... i still couldn't find how to do this with MailWizz.

In MailWizz i've found that you can only get this info for a specific campaign,
(which doesn't reflect a pattern) but not for a period of time (example: no opens
between date 1 and date 2).

Since every email that you send has a cost...this function usually helps
a lot to detect emails that are no longer responsive so you can then delete
them (or send other kind of offers to re-engage them etc).

Is there any way to do this?