Admin Messages are not received

I don't know what email address (if any) is related to the admin_messages (top next to Dashboard and Terminal buttons). I have sent email to all the email accounts I have set up and no email or message is received in the Admin Messages section. In the CWP Settings -Edit Settings I typed a Root email that is the same as one email account I set up.  Where are the Admin Messages received from?  Is this section about Messages or emails? Where are they sent from?
Otherwise all the email accounts I set up are receiving and sending email without problem.