Emails notification are sent as zoho.com instead of mydomain.com

Emails notification are sent as zoho.com instead of mydomain.com

Can anyone advise me why zoho email suite sends email notifications as

noreply@zoho.com or mailer-daemon@mail.zoho.com instad of mydomain.com

also the subject is 
  ZohoMail - you have been subscribed to mygroup@mydomain.com
  Zoho Mail :: Confirm email forwarding

and the contact details provided on the default forms for all notification type emails
      Contact support@zohomail.com for any queries

and a zohomail icon is added to the email. (which does not render om y client!!)

I'm using the free version for now
  1. but I don't want this behavior if i'm paying for each domain account


  2. I would expect one email account to flagged as "support/admin/contact" (@mydomain.com to be used as contact in all email forms) - my dashboard states contact email is admin@mydomain.com - but it's not used anywhere!!


  3. I would also expect all notification emails to be delivered from xxx@mydomain.com


  4. I don't believe anything should reference ZOHO when using a paid subscription account

thanks
Peter
ps. I won't use this solution on a paid basis if sent emails are promoting Zoho.