Bounced Email for new account invitees

When setting up a new user for my organization, I created their Zoom Account before their email account had been configured. When I sent the invitation, of course, it bounced. Once I had created the user's email account 

they were still unable to receive an email despite my repeated attempts to resend the invitation.

Finally I contacted the Zoom helpdesk who told me the email account had been blocked on their end due to the 

initial bounce. As a Zoom Admin I would like to be able to see if a user's email has been blocked by Zoom.

Thank you.