"Important -- Action Required by Applicant"

I recieved a mail from Georgia Tech Graduate Admissions(gradinfo@mail.gatech.edu) asking me to create GT account. I was able to create a Passport account after following the instructions. I was also able to login to mail.gatech.edu but see that "You do not currently have a GT Mailbox."

Anyone receive a similar message? Not sure what this is about. I feel a bit confused as I have applied 3-4 days back and my status is still "To Dept. for Review".