How to manage multiple mailboxes for my customers from single admin account

How to manage multiple mailboxes for my customers from single admin account

Hi, 

This question is probably answered somewhere but I couldn't find one.


I am a web dev and have a Mail Lite plan for myself. I have few customers who want email service for their websites and asked me to manage everything (like billing, management, and integration with the website that I built for them).


They want a way to access their email and use it themselves.


The question is that I can't find a way to register multiple mailboxes and give access to the customer from my main account (like an admin account).

* Is it the right way that I can buy Zoho Lite plans and charge my customers with added management/service charges?

* Do I need to look at other Zoho service to achieve this setup?


I would prefer the user to login to a website (like mail.zoho.in) to access email instead of downloading and configuring "Zoho Mail Desktop Lite client"