How to change 'primary' user in Zoho Campaigns

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