All of you should have used form form G-1145, To be used by an Applicant or Petitioner who can file their application/petition at one of the three USCIS Lockbox facilities, and who wishes to receive electronic notification (e-Notification) that their application has been accepted.
And now you all will not be complaining and waiting...!!! Good Luck to All of You.
Here is the Link to this form http://www.uscis.gov/portal/site/uscis/menuitem.5af9bb95919f35e66f614176543f6d1a/?vgnextoid=d9056d4e88ac3210VgnVCM100000b92ca60aRCRD&vgnextchannel=db029c7755cb9010VgnVCM10000045f3d6a1RCRD