Still no mail today......
I called in the admission office,and they told me that the acceptance notice does not necessarirly come via email. The woman I spoke to said, "it is true the email waive was sent out last week and this week, but it doesn't mean that those who haven't got emails weren't accepted". I don't know if she meant those who haven't received letters can be on the wait list, or people, who were finalists in the process, will receive their acceptance letters via mail.
Either way, it is so frustrating.