When we will receive the mail?

I got the email from USCIS and approval notice mailed. I want to know how long it take to receive it. I moved last year and call them change the adress. Still a little bit worry they sent the mail to the old adress. What should I do?

Thanks!

I also share my info. with you:

EB2/NIW
I-140: 12/2004(RD)
I-485: 2/2005 (RD)
1st FP: 8/2005
2nd FP: 4/2007
I-485: 4/2007 (AD)

Thanks!