Hello nancy289,
You may find some helpful info regarding the 'Hide My Email' feature here: What is Hide My Email?
The page will help to provide the following details, amongst the other info:
Hide My Email generates unique, random email addresses that automatically forward to your personal inbox. Each address is unique to you. You can read and respond directly to emails sent to these addresses and your personal email address is kept private.
The emails sent to the unique, random address that is created will not have its own inbox, but it will be automatically forwarded to your designated personal email address to view there.
Cheers.