@Napoolion - I see the hooks urls look good, do you have a delivery server with id = 6 in your app? If your mailgun delivery server has other id, make sure you update above urls with it.
Gmail bounced back nicely to mailwizz.
What was interesting about email what does not even with domain that does not exist::
It started retrying and retrying and retrying and does not show it has soft bounce or anything. However i just hope it will retry and retry until it understands, that it is a bounce and when it does, it will let mailwizz know as well.