Shared photos
I'm trying to Share Photos between an iMac (2019) and a MacBook Pro (2019). The two devices have different Apple ids. When I successfully create a Shared Photo album on the iMac I send several invites. None of the the email invites are received (not certain they were actually sent by the iMac), irregardless of the email address used. When I create a Shared Album on the MacBook and send invitations, the email invite to the iMac is not received. However, an iPad on the same Apple id as the iMac receives the invitation and I'm able to successfully connect. All the appropriate selections are marked in System Preference in Apple and on Photos. It appears there is an issue with Shared Photos on the iMac. Both devices are using macOS Catalina 10.15.5. Suggestions?
iMac Line (2012 and Later)