Error when doing a new user in new domain

Error when doing a new user in new domain

Hi

I just bought 3 licenses from Zoho, added my domain but when I try do create a e-mail user on that new domain I get a error:
A hospedagem de emails não está habilitada para sua organização

or in english:
The hosting of e-mail is not enabled for your organization

Someone can help me? =/