1 business with multiple emails. How to see all emails with 1 login?

1 business with multiple emails. How to see all emails with 1 login?

I have a business with multiple email accounts with Zoho.  Right now I have to keep logging in or out to switch between emails.  for example info@abc.com, support@abc.com, accounting@abc.com
How do I just do 1 login to access all the accounts?
Thanks!