What about setting the "x emails" number to something super high, so it'll never be reached, and then just do what @twisted1919 said — set the limits to that number of emails per every 8 hours (1 day / 3)...I'm looking at: Setting a customer group where the user can only email up to 3 times a day, regardless of how many emails they can send each time.
Mailwizz settings seems to set number of emails sent per hour/day/month. That's what I see is Customers -> Group -> Sending. This type of configuration in Mailwizz seems to be credit-base sending (or pay-as-you-go sending).
I'm not looking at that, I'm looking at how many times a customer can send per day, with no checks on how many emails sent each time.
I don't know if this is clear enough to understand, or maybe I miss out this feature somewhere in the system.
If this is not understood, I'll find other ways then.