Hi, I am planning to upgrade my free trial to a paid one with Basic membership, I have couple of questions.

1- Under a basic membership, how many individual domains can I add?

2- I want to integrate my Zoho email ID into the Gmail inbox, would basic membership allow that?

3- Could I get a ZohoMail only plan for less number of domains? 

I only need to use ZohoMail and not the workplace itself, I am looking forward to the answers, cheers.