How to send calendar invitations with my main email which is not the same as my calendar account

Hi there, is there a possibility to send calendar invitations with my main email address which is not the same as my calendar account? My goal is to have a calendar which is located in the cloud so that I can read and change it anytime. So I created a google account in order to use the calendar function with it. And I added the account (calendar) to eMCllient. That is working but when I send invitations to someone the email will be sent with the gmail email address. But it should be sent with my main (work) email address. At the end I only need gmail to store the calendar data online so that I can access it from everywhere. Or do you have any other idea how I can achieve my goal to access and modify the calendar as I can do it with my emails? Unfortunately my provider (hosteurope) does not provide a calendar which I can connect to eMClient.
Thanks a lot!
Klaus