收到TAMU套磁教授的unofficial邮件，是被录取了吗？

邮件内容如下：
You should be receiving an official letter from Dr. xxx. I have heard, and it is unofficial, that you have been accepted! I look forward to working with you.
这是录取了吗？还有这种unofficial的最后不会有什么意外又不被录取了吧？有点担心