Hi: 

    I just sign up zoho mail for testing my new website service, currently I registered as free user, and I have a domain, I will bind my domain with zoho mail, so my website can send email with my domain name address. As my website just starts up, so I want to keep free zoho mail account for a while.  My usage is: sending email from my website using smtp protocol in a program. 

    So I want to know the rate limit of Zoho mail on sending email, so I can evaluate the usage. Is there a dedicated document about it? e.g: How many emails can be sent per day? Is any special requirement on smtp sending mail? 

Thank you!