How to get client site Brand Email.

How to get client site Brand Email.

helo guys, I have a client site, and I'm handling it from very long time. But unfortunately google has disabled my Email address where I received his site Email Like through Email FOrwarding, but I heard that I can do same task with using domain email   that can I create with Zoho, So I want to know the procedure that how can I get Domain EMail using Zoho, while I don't have access to Clients site dashboard.