If you have your own domain and you are unable to receive and send emails from this address because it involves additional costs, CloudFlare has prepared the perfect solution for you.
Email Routing (email forwarding) is a free service worth considering.
To use this option, our domain must be managed on CloudFlare’s DNS servers. If we have MX (mail) records for another service, we will need to delete and replace them.
Email Routing involves setting an email address in the domain from which each email received will be forwarded to another mailbox.
If your business email address is on a Gmail domain, why not start using email on your own domain. You will gain more prestige and professionalism, even though nothing will really change for you, because we will continue to receive mail on the mailbox that you have been using so far.