Super Admin mailbox address is different than its Email ID?!

Super Admin mailbox address is different than its Email ID?!

Hi

My super admin email/ID/everything was  info [at] yami,us but I just changed it to  al [at]yami,us

Now as you see in screenshot its mailbox address is different than its Email ID and when I click change for mailbox address drop down menu,  al [at]yami,us  is not there!

Also in Mail Administration >> Mail Accounts  there is only  info [at]yami,us  (al [at]yami,us  is missing there)