Mailing credit costs for Zoho One users

Mailing credit costs for Zoho One users

Hey Zoho MH gurus.
I am still a little confused by the ZohoOne MH pricing. I read on a Zoho facebook group that email out of MH require an additional cost.  I've been told that we have the following limits to MH for ZohoOne users...

Max leads = 500 + (number of users x 500).

What is not stated is the maximum number of emails MH can set out.  I've been told it is zero, without extra payment. 

For large, bulk email campaigns, I can understand the need to charge credits or set limits. But I cannot find the costs or limit descriptions for this anywhere.

However, for drip-feeds and auto-responders, I have no idea as the extra costs or limits (if any) as a ZohoOne client.

Can someone from Zoho please give us a concise summary of all the MH costs for ZohoOne users, including any costs for outbound emails.

Best regards.
Joe