How to change 'primary' user in Zoho Campaigns

When someone subscribes to our list then he gets email notification with this From information:

From: arl-shipping.com Limited < ed@arl-consulting.com>

I understand there is no way to substitute company name by personal name. How do I change 'from' email address to be ed@arl-shipping.com instead of ed@arl-consulting.com?

I understand ed@arl-consulting.com is used because it is 'superadmin' account or so, but how to change that so that ed@arl-shipping.com becomes 'primary' or 'superadmin'?

Evgeny Drokov