Has open *Any* Email in email behavior

Has open Any Email in email behavior

I would like to know which costumers are not opening any mailing that sent to them

Campaign / Data

How will this idea be used? I want to send emails to active clients and give them special discounts. In addition I want to use this to find the inactive clients and turn them into active clients × Attachments Open full size
What is your industry?	Marketing & Public Opinion Research
What is the idea priority?	Urgent