I investigated the mysterious emails furthur to find that we do send out automatic emails to students. The email is sent from a sender called 'blueox.' We try to build in enough delay so that an Official Decision Letter is received before the email. I would still wait for the Official Decision Letter to arrive before opening any emails.
If an email and a Decision Letter do not line up (i.e., one says accepted and the other say denied), or if you are still unsure about an email, forward it to me at brandon.phillips@admission.gatech.edu and I will look into it. Include your GT ID# in any emails you send
Hope this is not too confusing.