Hi RaulOcana,
It could be done in 2 ways -
1. You can find OOO tracking reports in tracking logs of the delivery, export and then can group them by domain to find the report that helps your purpose.
2. Create a workflow by fetching deliveries you want to check, and you can use aggregate functions on opens and clicks in trackinglogrcp schema to find counts by domain.
Hope this helps!
Thanks
Deepak