I have a trial running for Zoho All-in-One. And trying out some services: seems this would be a keeper for me!
Although I'm running into a problem: when I want to try out Zoho Mail I get this screen:
http://d.pr/i/efCbgu
I tells me my phone number is already added to my account and I have to setup my phone number as my login name. But I can't find to do that anywhere. Also not on the page you are referring to with the link on the page with that notice.
So I can't try out Zoho Mail at this state.