Resend mass email to lead who are in "Sent" status

Hello,

I've send a mass email to 50 leads belonging to a custom view.

Then I created a custom report and I've seen 18 leads didn't open the email.

As I'd like to send them a last reminder using mass email, how can I filter the leads based on email subject + status in order to be able to send them the reminder?

I can't filter the custom view by e-mail status + email subject, but I see those datas on the custom Report.

Thank you