The email will go to any address you choose. I note that many use an email address in the from field but I use the chosen cPanel username @ server name and they always come though without fail.
I’ve noticed that some seem to get a terrible pickle over setting up forms and introducing added code, which I cannot understand unless they have really weird web hosts. This has always been very straightforward in my experience.
If you are using a 3rd party service like Office 365 you might well need to change the mx settings inside the zone editor and set the routing to remote, however this is not really to do with Blocs. I have a few client websites like that where there is not even an email address created on the server and it works fine.