I just got this email: Subject: DHL Tracking Number B670BS9K Body: Hello! Unfortunately we were not able to deliver the package you have sent on the 3rd of June in time because the addressee's address is not correct. Please print out the invoice copy attached and collect the package at our office. Your DHL Delivery Services. There was a .txt file attached. Stupidly, I opened it. There was no text inside. I did a Google search and it said that it contains Malware. Does anyone know if this affects Mac OS users? Should I go back in time (using my Time Machine).... or am I okay?