iCalender invites to Google Calendar shows my email (organizer) as a lengthy @imip.me.com address

When I initiate a calendar invite on my Mac (as "the organizer"), inviting a Google Calendar email address, the "organizer" on the Google calendar shows up as a lengthy "....@imip.me.com" address and not the organizer address e.g. xyz@me.com.

How can it just show my actual address in Google Calendar?